短语词组短语sulzer by -pass system 苏尔寿旁路by -pass VAV system 旁通变风量系统continuous by -pass system 连续旁路制integral by -pass system 整体旁路系统steam by -pass system 蒸汽旁路系统hp by -pass system 高压旁路系统BPS By -pass control system 旁路控制系统 返回 bypass system