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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。
- Some metals weld better than others. 有些金属容易焊,有的不容易焊。
- 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
- 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。
- Storms spring up easily in this region. 这个地区很容易发生风暴。
- 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
- It takes speed and skill to weld steel at this heat. 在这样的温度焊钢需要速度和技术。
- 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
- A vineyard or wine-producing region in France. 克鲁法国的葡萄园或葡萄酒生产区
- Food and fuel were scarce in this region. 这地区食物和燃料都很缺乏。
- It take speed and skill to weld steel at this heat. 在这样的温度焊钢需要速度和技术。
- There used to be a military base in the region. 这地区过去有个军事基地。
- He is an authority in the region of chemistry. 他是化学界的权威。
- I have a pain in the lumbar region. 我腰部疼痛。
- There used to be a lot of troubles in that region. 那个地区过去动乱不已。
- It takes speed to weld steel at this heat. 在这样的高温下熔接钢铁需要快速。
- Nobody likes to live in that desert region. 没有人喜欢生活在那个沙漠地区。
- They are prospecting the region for oil. 他们正在该区勘查油矿。