SAE干式密封短外锥管螺纹
dryseal sae short external taper pipe thread
波纹管式密封圈
bellows type sealing ring
层状剪切式密封系统
stratified shear seal system
船用端部密封式气密滑动门
marine end-sealed airtight-sliding door
搭接式密封环
lapping elasticity seal ring
单流环式密封油系统
single-ring type sealing oil system
阀控密封式铅酸蓄电池
VRLA battery
VRLA batteries
valve regulated lead acid VRLA