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- This welding backing is used with all one-side processes.Especially for those which do not demand back bead cleaning. 本衬垫可用于各种单面焊接工艺的位置，特别适用于不一定要求封底焊道的场合。
- Analyses the welding phenomena of first bead( back bead) in large current one side welding using high speed rotating arc, discusses various welding parameters control methods, and indicates the possibility of one side welding. 分析了高速旋转电弧大电流单面焊第一层焊道(封底焊道)焊接现象;并对各种焊接参数调节方式进行了讨论;展示了实现单面焊双面成形的可能性.
- Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
- He trudge three hour in the snow to get back home. 他在雪中跋涉三个钟点才回到家。
- The crowd fell back to let the players through. 人群后退让运动员们通过。
- Do exercise every day and you'll be back in condition. 每天锻炼锻炼，你很快会恢复健康的。
- The ship beat back against a monsoon. 船逆着季风艰难地行驶。
- I flap the flies away but soon they fly back. 我把苍蝇赶走，但一会儿又飞回来了。
- I never lend books; you never get them back. 我的书决不外借，因为总是有去无回。
- She leaned her head back and whispered the news. 她向后仰着头，小声说出了这个消息。
- The talks have been put back to Friday morning. 谈判推迟到星期五早上进行。
- He hated to tuck his tail and back down now. 他讨厌此时夹着尾巴退回来。
- After a long coma the sick man slowly came back. 昏睡了好久以后，那个病人慢慢地恢复了活力。
- Back in Nigeria we used to play a lot of tennis. 我们以前在尼日利亚经常打网球。
- The crowd fell back to let the ambulance through. 人群往后退，让救护车通过。
- The teacher get a raspberry as she turn her back. 该教师转过身去时有人用舌与唇发出嘲笑她的声音。
- He is a full back of our football team. 他是我们足球队中的后卫。
- How much did your new bicycle set you back? 你的新自行车花掉了你多少钱？
- A terrible storm forced the ship to put back. 可怕的风暴迫使这条船返航了。
- I had to spend a large sum of money to get it back. 我得花一大笔钱才把它弄回来。
