安全阀

Duplex safety valve

双联式安全阀

双口排气球 Double Opening Exhaust Valves | 双联式安全阀 Duplex safety valve | 双闸板 Double gate disc

ball safety valve

球形安全阀

ball retaining plug 塞销 | ball safety valve 球形安全阀 | ball sealer 封堵球

ball safety valve

安全球阀,球形安全阀

ball rust test | 球腐蚀试验 [BRT] | ball safety valve | 安全球阀,球形安全阀 | ball screw | 滚珠丝杆

balanced safety valve

平衡式安全阀(可变动背压)

balanced distribution valve 平衡配气阀 | balanced safety valve 平衡式安全阀(可变动背压) | ball check valve 止回球阀, 球形节流阀

balanced safety valve

平衡式安全阀(可变

balanced distribution valve 平衡配气阀 | balanced safety valve 平衡式安全阀(可变 | ball check valve 止回球阀, 球形节流阀

Boiler safety valve

安全阀

Blow-off valve seat|放水阀座 | Boiler safety valve|安全阀 | Boilor check valve seat|止回阀座

Boiler safety valve

锅炉安全阀

boiler main steam system 锅炉主蒸汽系统 | boiler safety valve 锅炉安全阀 | boiler secondary air blower 锅炉二次鼓风机

eye hook with safety latch

带安全阀的耳钩

eye glass 眼镜片 | eye hook with safety latch 带安全阀的耳钩 | eye instrument 眼科器械

pop off valve

安全阀

phase-bistable flip-flop相位双稳态多谐振荡器 | pop-off valve安全阀 | pop-up buoy急出急没浮筒

Restrictor Valves

过流阀 ( 或节流阀 ) Safety Valves 安全阀

Quick Draining Valves 快速排污阀 | Restrictor Valves 过流阀 ( 或节流阀 ) Safety Valves 安全阀 | Screw Pumps 螺杆泵

of a composite function：复合函数之导数

Derivative :导数 | of a composite function :复合函数之导数 | of a constant function :常数函数之导数

enriched lake：富营养湖

LRPA Long-Range Patrol Aircraft 远程巡逻飞机 | enriched lake 富营养湖 | bang it about 决胜负 诉诸武力