密封 密封的英文 英语翻译 airproof; pressure; pressurize; seal airtight; seal upcapsulation; encapsulationlutation; luteair proof; seals 拓展翻译 迷宫密封labyrinth packing迷宫密封螺母labyrinth nut迷宫密封箱labyrinth box迷宫密封压力比labyrinth pressure ratio迷宫式密封labyrinth packing密封泵canned pump; leakproof pump密封波纹管seal bellows密封材料sealing materialsealing material密封裁决sealed verdict密封舱sealed cabinsealed cabin密封槽seal groove cavity密封层sealer密封衬垫gasket密封冲洗液seal flush liquid密封传动套seal drive sleeve密封唇口seal lip密封的hermetically; hermetically-sealed; packaged密封电机泵canned-motor pump密封电路sealed circuit密封垫gland