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用unscrewing造句子,“unscrewing”造句
Removethediebasebyunscrewingoutofhead.Gearoperatorisremovedbyunscrewinghexheadscrewswhichholdoperatortovalvebody.Overheadafanloppedawayoff-kilteronthevergeofunscrewingitselffromtheceiling.Itcanberemov...
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