短語詞組短語trough chain conveyor WESTBANK 環(huán)鏈式輸送機trough band conveyor 槽形膠帶運輸機trough belt conveyor 槽形皮帶運輸機trough chain conveyor 槽形鏈板輸送機;環(huán)鏈式輸送機staggered trough type conveyor 階梯型螺旋輸送機Depth trough type conveyor belt 深槽型輸送帶deep -trough belt conveyor 深槽型膠帶輸送機U -trough scraper conveyor 型槽刮板輸送機air trough conveyor 空氣輸送斜槽 返回 trough conveyor