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The experiment study about the subcritical normalizing holding temperature effects the macrostructure and hardness of the 40SiMnCrNiMoA steel shows: When subcritical normalizing holding temperature is 760℃, the ferrite in the mixture phase structure is lumpish, the hardness of the steel is low (about HRC32), and when the holding temperature is over 800℃, the hardness of the steel is about HRC49, the ferrite in the mixture phase structure is in old critical range austenite grain boundaries, it is disadvantage for the steel strengthening. When the holding temperature is 780℃, the mixture phase structure is mixture phase structure including the strip ferrite、martensite and bainite, the ferrite is less than 20%wt, its grains are fine and even, the hardness of the steel is about HRC38, it is in the range of HRC35-40 which is the long-life drill rod needed.

亚温正火温度对40SiMnCrNiMoA的组织和硬度等性能的影响的实验研究表明,当亚温正火保温温度为760℃时,复合组织中的铁素形态是块状,处理后的材料硬度相对较低(HRC32左右);而当采用大于800℃温度亚温正火处理,材料硬度为HRC49左右,组织中铁素大部分较连续地存在于原奥氏的晶界,对材料强化不利;当40SiMnCrNiMoA钢780℃亚温正火后,硬度为HRC38左右,在以往小钎杆较长寿命所需硬度范围HRC35-40内,而组织为细条状铁素+以板条马氏和条状无碳贝氏为主的复合组织,晶粒细小均匀,铁素积含量少于20%。

Study using infrared microtechnique reveals three types of fluid inclusions in rutile:Ⅰ-type aqueous inclusions,Ⅱ-type CO_2-H_2O inclusions and Ⅲ-type CH_4 inclusions. Primary and pseudosecondary type Ⅰ inclusions, as well as Ⅱ-type fluid inclusions, having a range of pressure between 0.6 and 1.3 GPa, were trapped during the amphibolite-facies retrogression stageof eclogites, suggesting that fluids related to rutile mineralization originated from water released during retrograded metamorphism of eclogites.

利用红外显微镜对金红石进行的流包裹研究表明,金红石中主要存在三类流包裹,即Ⅰ型H2O溶液包裹、Ⅱ型CO2-H2O包裹和Ⅲ型CH4包裹,其中I型原生和假次生流包裹和Ⅱ型流包裹反映出的压力范围为0.6~1.3 GPa,与榴辉岩角闪岩相退变质作用的压力相当,说明与这类金红石形成有关的变质流源于榴辉岩退变质作用所释放的水。

The invention relates to a nut (10) comprising an outer body (16) with an axial passage (22), an inner body which can be movably placed in the passage along an axial direction and which is divided along said axial direction into at least two jaws (18, 20), each jaw bearing an inner thread segment (24) on its radial inner surface, first guiding means (26) located on the outer body, as well as second guiding means (30) located on the jaws and co-operating with the first guiding means so that the jaws are radially displaced towards the exterior when the outer body is displaced in the unscrewing direction relatively to the inner body et radially displaced towards the inside when the outer body is displaced in the screwing direction relatively to the inner body.

本发明涉及一种螺母(10),它包括:一个带轴向通孔(22)的外(16);一个内,位于通孔(22)中,可沿轴向移动,并且沿所述的轴向方向至少分成两个滑块(18、20),它们各自在其径向的内表面上具有内螺纹部分(24)。在外上有第一导向装置(26),同样滑块上有第二导向装置(30),第二导向装置与第一导向装置共同起作用,所以,当外相对于内沿旋松方向作相对滑移时,滑块径向地向外滑移,并且,如果外相对于内沿拧紧的方向滑移,则滑块径向地向内滑移。

Results show that floes' VC and D at the surface water were closely related to current velocity; and the peaks of VC lag those of the current velocity. The lag variation during ebb and flood tides is 10-30min and 30-50 min, respectively. Current velocity at 50 cm/s is a turning point of D vs. vertical average current velocity, before the point, Dm increases with current velocity, and decreases after the point. Similarly, VC at 75μl/L becomes a critical point in the surface water, below the point, D increases with VC, and above the point, D stabilizes.Δp is D dependent, larger floes have much lower Δp than smaller floes. Both D and Δp of floes affect ω. In the surface water during spring tide and neap tide, a power exponent relationship exists between Δp and D, and ω and D.

研究表明:①长江口徐六泾表层絮凝积浓度主要受水流流速影响,再悬浮现象明显,积浓度过程线滞后流速过程线,落潮期间滞后10-30min,涨潮则滞后30-50min;②小于一定流速时絮凝平均粒径随流速增大而增大,大于一定流速时絮凝平均粒径则随流速增大而减小,徐六泾夫、小潮表层絮凝在50cm/s的垂线平均流速时出现平均粒径与垂线平均流速关系的转折;③徐六注大、小潮表层絮凝平均粒径在积浓度75μl/L时出现平均粒径与积浓度关系的转折,积浓度小于75μl/L时粒径随积浓度增加而增大,超过75μl/L时粒径随积浓度的增加变化不明显;④絮凝有效密度由粒径大小控制,粒径大,有效密度小,反之亦然,粒径和有效密度共同决定絮凝静水沉速,有效密度和沉速与平均粒径之间均存在良好的幂指数关系。

The results showed that the number of chromosome, which was from the cultured seedlings of meristem tip and the rank seedlings of meristem tip, was not altered, both the number were 2n=16,the hereditary stability of callus and regeneration plant was poor; and the variation percentage of chromosome in callus was 43.4%, among which haploid accounted for 6.7%, triploid accounted for 2.5%,tetraploid accounted for 10%,pentaploid accounted for 4.2%,hexaploid accounted for 3.3%,septuploid accounted for 4.2%,octoploid accounted for 3.3%,dysploid accounted for 9.2%;the chromosome variation percentage of differentiation seedlings derived from callus was11.7%,among which haploid was 6.7%,triploid accounted for 1.7%,tetraploid was 3.3%.

结果表明,茎尖分生组织培养的幼苗及丛生苗遗传稳定,其染色未发生倍性变异,均为2n=16;愈伤组织及其再生苗遗传稳定性较差,愈伤组织染色数变异率为43.4%,其中单倍占6.7%、三倍占2.5%、四倍占10%、五倍占4.2%、六倍占3.3%、七倍占4.2%、八倍占3.3%、非整倍占9.2%;愈伤组织分化苗染色变异率为11.7%,其中单倍占6.7%,三倍占1.7%,四倍占3.3%。

At each penton, a hole (φ=20〓) can be seen connecting the inside and the outside of the capsid, and there is a hole (φ=12〓) at each hexton and the center of 2-fold axis, so there are 132 holes in total at the surface of CSBV.

应用冷冻电镜技术和计算机三维结构重构的方法,我们测定了CSBV核衣壳的三维结构,分辩率为25 〓,病毒的核衣壳是按T=1(P=3)的对称结构排列二十面,病毒表面比较光滑,有12个五邻、60个六邻的结构,每个五邻的中央有孔洞,六邻的中央也有孔洞,另外在2次轴的位置上也有孔洞,这样病毒共有132个孔洞,五邻的孔洞的直径为20 〓,而六邻和二次轴的孔洞的直径月为12 〓。

Sinense, the spores germinate inside their exospores and then divide into massive protonemata;the massive protonemata can form two kinds of protonemata of which one is clubbed protonema with papillae,and the other is caulonema composed of long and cylindrical cells ; the gametophyte archaeocytes only occur on the massive protonemata.

结果表明:中华缩叶藓的孢子在壁内萌发,随后分裂产生块状原丝;块状原丝上可产生两种丝状,一种是具疣的棒状原丝,另一种是由长圆柱状细胞组成的轴丝;配子原始细胞只产生于块状原丝上。

Results showed that the PMC meiosis of autotetraploid was similar to the diploid except some particularities. In metaphase Ⅰ, multivalent, quadrivalent, trivalent, bivalent and univalent were observed and some of the chromosomes were found not to rank on the metaphase plate and so did in metaphase Ⅱ cells. In anaphase Ⅰ and anaphase Ⅱ cells, there were lagging chromosomes, chromosome bridge and fragment. During anaphase Ⅱ and telophase Ⅱ, chromosome segregation was not synchronous or equal. At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.

结果表明,同源四倍花粉母细胞减数分裂过程与二倍相比,中期Ⅰ染色构型复杂,有多价、四价、三价、二价和单价;中期Ⅰ及中期Ⅱ有部分染色没有排列在赤道板上;后期Ⅰ及后期Ⅱ出现落后染色、染色桥及断片;后期Ⅱ和末期Ⅱ有染色不同步分离及不等分裂的现象;四分时期还出现二分、三分、含微核的异常四分及多分

The experiments show that the remelting hardening layer consists of melting zone, quenching zone and heat affected zone. From surface to internal, the respective microstructures are extremely small hidden-crystal martensite and a few residual austenites, hidden-crystal martensite and carbides and residual austerite, martensite and backfire troostite and ferrite.

实验表明:熔凝硬化层由熔化区、相变硬化区和热影响区组成;由表及里组织分别为极细隐晶马氏+少量残余奥氏、隐晶马氏+碳化物+残余奥氏、马氏+回火屈氏+铁素

Business card printing and membership card phantom follows the rules of art, the early business card printing and membership card more conventional, Phantom, rigor, the present business card printing and membership card in this regard, Phantom, incorporates nonanatomical fine arts in rules, which has greatly enriched the business card printing and membership card expressive force of the Phantom, and with the help of computers make business card printing and membership card production processing methods both convenient and rich, makes up for his personality.

制卡和会员卡制息沿袭了法规美术的特不背,早期的制卡和会员卡制息较板滞、刚硬,此刻的制卡和会员卡制息在这不圆背有所冲破,吸纳了不法规美术的改变法规,不小不小丰裕了制卡和会员卡制息的表示力,而且借助电脑使制卡和会员卡制息办理办法上既便捷又丰裕,填充了其本性上的不敷。

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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?