self-filling self-locking float collar的意思|示意
美 / /
英 / /
自填自锁浮领
self-filling self-locking float collar的网络常见释义
自灌自锁浮箍 自攻自钻螺钉(多种头型） self-drilling tapping screw 自灌自锁浮箍 self-filling self-locking float collar 自降封隔器 self-dropping packer ..