backstep
短語詞組
- backstep flow 后臺階流動
- backstep sequence 分段后向法;分段退焊
- backstep welding 分段退焊;逐步退焊法;反向焊;分段逆焊
- annular backstep 環(huán)形后臺階
- backstep method backstep 方法
- backstep sequence detail 分段退后次序
- backstep welding sequence 分段退焊次序
- backstep -welding 后退焊接
- backstep sequence welding 分段退焊 返回 backstep