球齒鉆頭 的英文怎麼說
中文拼音 [qiúchǐzhēntóu]
球齒鉆頭
英文
button 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。Ball hob drill head is applicable for harden rock layer, fine grain granite, and it has below 9 - grade drillability. the compressive strength is no more than 15 of pull coefficient
球齒滾刀鉆頭適合於堅硬巖層,細晶花崗巖,可鉆性9級以上,抗壓強度在普氏系數15 。
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