drain valve〔名词〕疏水阀详细»
drain valve〔名词〕排水阀,排水管阀详细»
drain valve〔名词〕放泄阀详细»
drain valve〔名词〕排水阀详细»
drain valve〔名词〕排水阀,排水阀,排水管阀详细»
drain valve〔名词〕排水阀详细»
排水阀discharge valve;draining valve;draught详细»
排水阀bale valve;drain valve;empty land;water drain apparatus详细»