face-flangeflat-face flangeplain-straight-face flangeplane normal平面: plane; two dimensions; flat ...法兰: flange平面法兰式夹持器: flange holder with flat seat突肩平面法兰式夹持器: flange holder with flat seat and small shoulder平面法: planar method; planar process下载手机词典可随时随地查词查翻译