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- The features of manual downhill welding,semiautomatic welding,automatic welding and other welding technologies like butt flash welding and laser beam welding (LEW) and so on are analyzed. 分析了手工下向焊、半自动焊、自动焊及特种焊等焊接方法的特点,在选择焊接方法时应考虑管道直径、壁厚、管道长度、设计条件、管子级别等因素。
- Business has been going downhill recently. 近来生意在走下坡路。
- His work has been going downhill recently. 最近他的作业愈来愈糟。
- The boys hurt themselves sliding downhill. 男孩子们滑下山时伤着了自己。
- Some metals weld better than others. 有些金属容易焊，有的不容易焊。
- downhill welding 下坡焊
- You can coast downhill on a bicycle. 你可以骑自行车滑下坡。
- 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。
- 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。
- You can coast downhill on a sled or a bicycle. 你可以乘雪撬或骑自行车向山脚下滑行。
- Once you are old it's downhill all the way. 人的年纪大了，身体就会每况愈下。
- 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。
- It was downhill the whole way after that. 从那以后一直都是下坡路。
- 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。
- She bent at the knee when she skied downhill. 她滑雪下山时曲膝下蹲。
- This part of the town used to be fashionable, but it's starting to go downhill. 该市这一地区一度很繁华，如今已江河日下。
- 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。
- Took unholy risks to win the downhill race. 为赢得下坡比赛冒可怕的风险
- It takes speed to weld steel at this heat. 在这样的高温下熔接钢铁需要快速。
- The street into which he had turned ran downhill. 他拐进去的那条街往下坡走。
