1、封底焊
... backrun背面焊缝 backrun封底焊 backrunning倒车运行 ...
2、背面焊缝
... bacilluscalmettegurin结核预防注射液 backrun背面焊缝 backachain锚链上加绑缆 ...
3、反转
...backrest block ==> (镗床的)后立柱移动块backrun ==> 反转,逆向backrun process ==> 逆行制气法 ...
4、逆转的
...逆转醇 resveratrol逆转的 backrun; inversive; reverse逆转点 inversio oint; inversion point ...