return bendreturn pipereturn-bend回: circle; wind管: pipe; tube回管腺: coiled tubular gland迂回管: jumpover; offset bend; pass-over offset粗粉返回管: outlet duct for tailings; outletductfortailings下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:回管,即可在微信中查询翻译