縮徑鉆頭 的英文怎麼說
中文拼音 [suōjìngzhēntóu]
縮徑鉆頭
英文
undergauge bit-
Special thermowell is manufactured from drilled bar stock to withstand pressure morethan 6. 4mpa, together with convenience in installation for movable connector
特製套管帶活動連接頭,安裝方便,整體鉆孔縮徑式套管結構,耐壓6 . 4mpa
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