jǐng xià ān quán fá
- subsurface safety valve
- DHSV(downhole safety valve)
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CoAtransferase,
coatroom,
coatsusceptor,
coattail,
coat-tail,
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相似单词
井然有序的,
井式炉,
井水不犯河水,
井筒形,
井蛙之见,
井下安全阀,
井斜,
井盐,
井眼,
井涌,