短语词组短语prelimit swith 预限开关thermostatic swith 调温开关Swith top 开关盖proximity swith 接近开关Temperature Swith 温度开关Tact Swith 轻触开关ASSORTED SWITH 组合开关mine swith 矿用电气开关vacuum swith 真空开关 返回 swith