底面

The results show that the friction on the lower die surface is beneficial to the preforming;the clearance between the roller base and lower die obviously influences the base end and open end dime...

结果表明，预成形时下模端面摩擦属有利摩擦；旋轮底面与下模间隙对最终工件的底部及口部尺寸具有较大影响；旋轮沿径向施加给工件的压下量对腰鼓件质量影响较大。

At present, asphalt macadam is often used as bottom course of the overlay on old concrete pavement in order to restrain reflective cracking in the engineering. The results in this research indicated that the abilities of resisting reflective cracking of this mixture were poor. The modified full asphalt mixture is most capable of resisting reflection crack than the others.

目前在工程上为了防治反射裂缝，旧混凝土路面加铺层常采用沥青碎石作底面层，本文的研究结果表明，这种类型混合料抵抗反射裂缝的能力很差，而使用改性沥青的富沥青密实型级配混合料抵抗反射裂缝的能力最强。

However, a group of gently west-inclined high-conductive layers, with a conductivity, of 0.04-0.25 S/m and a top depth of 20 km and a bottom depth of 40 km, were discovered under the high-resistance block of Hengshan Mountain.

底面深约40km。研究结果表明，华北裂谷盆地范围内地壳的电阻率很低，属于良导电性的地壳，这可能是由华北裂谷盆地的壳、幔热结构、热状态所决定的。

The principle of this kind of automatic ice thickness monitoring system is realized by detecting the vertical distance between the ice bottom and a fixed point in the water, which is measured by using a barrel moving from the fixed point to the ice bottom.

本自动监测冰厚装置原理，是通过测量冰层底面与冰下水中一固定端之间垂直距离来实现的。

From these parameters, the new findings are:(1) The ice density from investigation is lower than 2-3 tenths compared with that from NOAA Ice Chart, and the ice thickness in the summer is less than 2 m compared with the results investigated during the First Chinese National Arctic Research Expedition in 1999 (CHINARE-1999);(2) The standing deviation of ice bottom fluctuation is 3.8 times of that of the snow surface on the ice sheet and (3) the maximum speed of ice floe CHIS7 is 1300 m/h in rotation and oscillation.

这些参数指出：现场调查的海冰密集度同NOAA冰图上的密集度相比低2~3成，而厚度比1999年的中国首次北极考察结果减少2m；冰层底面起伏方差约是冰层表面积雪起伏方差的3.8倍；浮冰最快以1300m/h速度运动并伴随振荡旋转。

The manufacturer's name is on the bottom of the plate.

厂家的名称在盘子底面。

The rolling--ball flat--bottom mill shoe whose bottom face is overlaid with YD alloy is used to fully grind junks which is stuck downhole and impossible to be caught. Additionally, rolling balls which are dressed on cylinder face of mill shoe can guarantee the mill shoe not to mill casing inside wall during milling operation in hole.

滚球式平底磨鞋是用底面所堆焊的YD合金去全面磨碎那些卡死在井内无法打捞的钢铁落物，并且在磨鞋圆柱面上有可以起扶正作用的滚球，使磨鞋在井眼内工作时不磨铣套管内壁。

The coherences between Te and the thermal lithospheric thickness, the base depth of magnetic tectonic layer are much better in the whole Transect, these demonstrate Te of continental lithosphere is closely concerned with"heat"geophysical parameters, also prove the heat structure of the lithosphere is the primary factor of influencing the value of Te.

整个断面上热岩石圈厚度、磁性构造层底面深度与Te值的相关性更好。

8 Add ejectors x 4 positions to underside of clip feature.

2.8 加司筒 4 定位於特定夹的底面。

8 Add ejectors x 4 positions to underside of clip feature.

2.8 增加喷头 4 定位於特定夹的底面。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。