重磨鉆頭 的英文怎麼說
中文拼音 [zhòngmózhēntóu]
重磨鉆頭
英文
regrind bit-
But now the use of the spherical one - cone bit shows that the teeth are abrade heavily in advance, which affects the velocity and life of the bit
但是目前油田上使用的球形單牙輪鉆頭由於牙齒先期磨損嚴重，影響了鉆頭的機械鉆速和壽命。Wear - proof body is manufactured from bar stock of high temperature alloy. double - compound structure of wear - proof coated with double wear - proof layer prolongs service life
耐磨頭本體採用耐高溫合金鋼棒料整體鉆孔，外噴焊雙層耐磨層，形成雙重復合結構，延長耐磨熱電偶的使用壽命。Its main functions are maintaining borehole gage, improving drill string stability and protecting lower drill string from excessive wear
其重要作用是保持鉆頭尺寸符合標準，提高鉆桿穩定性，避免鉆桿下部過于磨損。The mill which had worked them down, was the mill that grinds young people old ; the children had ancient faces and grave voices ; and upon them, and upon the grown faces, and ploughed into every furrow of age and coming up afresh, was the sign, hunger. it was prevalent everywhere
那碾磨著他們的是能把小夥子磨成老頭兒的磨兒童被它磨出了衰老的面容，發出了沉重的聲音它在他們的臉上，也在成年人的臉上，磨出了一道道歲月的溝畦，又鉆出來四處活躍。分享友人