?封底焊

... backrun背面焊缝 backrun封底焊 backrunning倒车运行 ...

?逆转的

... 逆转醇 resveratrol 逆转的 backrun; inversive; reverse 逆转点 inversio oint; inversion point ...

?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 ...

?背面焊缝

... bacilluscalmettegurin结核预防注射液 backrun背面焊缝 backachain锚链上加绑缆 ...