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- At present basic theory and welding criterion of UPW are defective, research on welding mechanism and melt behavior of the welding region is not enough for the difficulty in study. 由于超声波塑料焊接是涉及多学科的交叉学科,研究难度较大,目前超声波塑料焊接的焊接基础理论和工艺规范还比较欠缺,对超声波塑料焊接机理和熔接行为研究不足。
- Most insect do not live in polar region. 大多数的昆虫不在极地地区生存。
- The earthquake may cause a region to fall in. 地震可以使一个地区下陷。
- Some metals weld better than others. 有些金属容易焊,有的不容易焊。
- The oil-lamp needs a new globe, spherical lampshade. 这油灯需配个新的圆灯罩。
- Analysis of Cracking and Leak at Welding Region of a Liquefied Petroleum Gas Pipe 液化气管线焊缝区开裂泄漏原因分析
- Storms spring up easily in this region. 这个地区很容易发生风暴。
- On reaching welding heat, the metal surfaces are pressed together. 当金属表面达到焊接热度时就会压在一起。
- He is earning a salary in the region of25,000. 他当时的薪金在25,000英镑左右。
- A storm that cut off power to the whole region. 切断了整个地区电力供应的暴风雨
- The Measuring and Analysis of the Temperature and Stress in the Weld Region of the Coke Tower Skirt 焦炭塔裙座焊缝区域温度及应力的测试与分析
- Old World leek with a spherical bulb. 旧大陆的一种带有球形茎的葱。
- A planar region bounded by a circle. 圆形区,圆形空间被圆所包围的一个平面区域
- Some of the students are welding capacitor; the others resistor. 学生中的一些人在焊接电容,另一些人在焊接电阻。
- A vineyard or wine-producing region in France. 克鲁法国的葡萄园或葡萄酒生产区
- A bacterium having a spherical or spheroidal shape. 球菌球形或回转扁椭球体形状的细菌
- Food and fuel were scarce in this region. 这地区食物和燃料都很缺乏。
- There used to be a military base in the region. 这地区过去有个军事基地。
- Some of the students are welding capacitors; the others resistors. 学生中的一些人在焊接电容,另一些人在焊接电阻。
- He is an authority in the region of chemistry. 他是化学界的权威。