楔刀 的英文怎麼說
中文拼音 [xiēdāo]
楔刀
英文
froe-
Wedge hob drill head is applicable for medium harden rock layer, coarse grain granite, and it has below 9 - grade drillability. the compressive strength is no more than 10 of pull coefficient
楔齒滾刀鉆頭適合於中硬巖層,粗晶花崗巖,可鉆性9級以下,抗壓強度在普氏系數10 。
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