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The method comprises: adding 4-(3,4-dichlorophenyl)-1-tetralone and solvent at a ratio of 1:(3-4) into a three-necked flask with a stirrer, heating under stirring until 4-(3,4-dichlorophenyl)-1-tetralone is completely dissolved, heating to 60-100 deg.C, refluxing for 0.5-2 h, cooling the filtrate to -5-10 deg.C, filtering, recrystallizing to obtain refined 4-(3,4-dichlorophenyl)-1-tetralone, and drying at 40-80 deg.C to obtain dry 4-(3,4-dichlorophenyl)-1-tetralone.

该方法的步骤是:在带搅拌的三颈瓶中依次加入4-(3,4-二氯苯基)-1-萘满酮和溶剂,溶剂与4-(3,4-二氯苯基)-1-萘满酮的L∶W为3~4∶1,将上述4-(3,4-二氯苯基)-1-萘满酮及混合精制溶剂搅拌下升温,使4-(3,4-二氯苯基)-1-萘满酮全部溶解,升温至60~100℃,回流0.5-2h;滤液用冰水冷却至-5~10℃,过滤,所得物料再用上述方法进行一次重结晶得到精品4-(3,4-二氯苯基)-1-萘满酮,40~80℃干燥后即得到干品4-(3,4-二氯苯基)-1-萘满酮。

Especially in the summer, sweating more, when the leather's pores to absorb sweat, hot and humid in the organic matter will sweat and leather a chemical reaction, will produce odor, should wash with wet wipe dry cloth.

特别是在夏季,出汗多,当皮革的孔隙吸收汗液,高温潮湿会使汗中的有机物与皮革发生化学反应,会产生异味,要勤用湿干的抹布擦拭。

Stone—not sun-dried mud brick—gave permanence to these ancient monuments.

石头—而不是晒干的土砖---使这些古老纪念碑永存。

Fourth, to avoid breaking material: Screw must not be allowed in the case of blanking operation, upon occurrence of the stator as dry friction of rubber, produces instant heat and burn, so good grinder, screw grille flow is a necessary condition for normal operation To this end, some screw pump body is also expected to stop off device installed, when there Fracture, because he has a self-priming screw pump function of the characteristics Chemical pumps of the body will produce a vacuum chamber, vacuum screw pump will stop operation.

四、避免断料:螺杆泵决不允许在断料的情形下运转,一经消防泵发生,橡胶定子由于干摩擦,瞬间产生高温而烧坏,所以,粉碎机完好,格栅畅通是螺杆泵正常运转的必要条件之一,为此,有些螺杆泵还在泵身上安装了断料停机装置,当发生断料时,由于螺杆泵其有自吸功能的特性,腔体内会产生真空,真空装置会使螺杆泵停止运转。

Screw must not be allowed to break at the expected operating circumstances, once happened, rubber stator do because of friction heat generated instantly burned, so, good grinder, screw grille flow are a necessary condition for the normal operation of one of For this reason, some screw pump was also installed devices break down material, when the expected happened when broken, because of the screw pump has self-priming function of its characteristics, the body will produce a vacuum chamber, vacuum devices will stop screw operation.

螺杆泵决不允许在断料的情形下运转,一经发生,橡胶定子由于干磨擦,瞬间产生高温而烧坏,所以,粉碎机完好,格栅畅通是螺杆泵正常运转的必要条件之一,为此,有些螺杆泵还在泵身上安装了断料停机装置,当发生断料时,由于螺杆泵其有自吸功能的特性,腔体内会产生真空,真空装置会使螺杆泵停止运转。

Screw does not allow for the case of run-off materials, once occurred, rubber stator due to dry friction, the heat generated instantly burned, so grinder intact, grille flow is a necessary condition for the normal operation of pumps, one of To this end, some screw pump is also installed in the body break down plant material, as occurs when the material off, because he has a self-priming pumps feature the characteristics of the body will produce a vacuum chamber, vacuum devices will screw pump to stop operation.

螺杆泵决不允许在断料的情形下运转,一经发生,橡胶定子由于干磨擦,瞬间产生高温而烧坏,所以,粉碎机完好,格栅畅通是螺杆泵正常运转的必要条件之一,为此,有些螺杆泵还在泵身上安装了断料停机装置,当发生断料时,由于螺杆泵其有自吸功能的特性,腔体内会产生真空,真空装置会使螺杆泵停止运转。

Once your onion is peeled, place it cut-side down, and make vertical cuts of the desired thickness from root to stem end.

一旦你的是洋葱去皮,把它摆在削减方下来,使之垂直削减所期望的厚度,从根到干到底。

Was founded in 1988, is a very high reputation of the domestic packaging industry modernization of plastic soft packing printing large-scale joint-stock enterprises, the company owns more than 15,000 square meters garden plants, supporting a full range of 4-storey modern office, elegant environment clean .1998 equipment since ongoing technological transformation, has introduced a Japanese Fuji FM-8 color and FM-10-color automatic high-speed computer gravure machine dry compound machine extrusion composite computer slitting machine mechanism bags, etc., so that the complete set equipment, fully adapted to modern market demands for flexible packaging products need to improve.

中港印务有限公司创办于1988年,是一家在国内包装行业声誉甚高的现代化塑料软包装印刷股份制大型企业,公司拥有15000多平方米花园式厂房,配套齐全的4层现代化办公大楼,环境幽雅清净。1998年以来不断进行设备技术改造,先后引进了日本富士FM-8色和FM-10色全自动高速电脑凹版印刷机干式复合机挤出复合机电脑分切机制袋机等,使公司设备成龙配套,完全适应现代市场对软包装产品要求日益提高的需要。

It has been proved that azotobacter CN-2 has a higher activity of nitrogen fixation in pure slant culture. Inoculated to wheat seen, the azotobacter can live in the rhizosphere, which has a higher activity of nitrogen fixation and improves nitrogen supplement to plant. Weight and nitrogen content of dry wheat seeding have been increased.

证实固氮菌CN-2具有较高的斜面纯培养物固氮活性,小麦播种时接种固氮菌,可以定殖在小麦苗根际并有较高的固氮活性,能显著改善小麦氮素供应,使苗干重、苗含氮量比对照均有较大幅度的提高。

They will pass through the sea of trouble; the surging sea will be subdued and all the depths of the Nile will dry up.

耶和华必经过苦海,击打海浪,使尼罗河的深处都枯干。

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