词汇	open and close valve
释义	open and close valve 开闭阀
随便看	perimeter frame perimeter function perimeter grouting perimeter heating perimeter hole Perimeter Institute for Theoretical Physics perimeter insulation perimeter intrusion detecting perimeter light perimeter-marked area perimeter marking perimeter-mounted compression constitution perimeter nation perimeter network perimeter of airway perimeter of a perimeter-marked area perimeter of deck perimeter of zone perimeter paper perimeter pass perimeter passing perimeter path perimeter patrol officer perimeter planting Perimeter-Portal Continuous Monitoring