carbide insert bit 镶硬合金齿的牙轮钻头
tungsten carbide insert bit 碳化钨镶齿钻头 ; 镶齿钻头
chisel type insert bit 楔形硬合金齿钻头
shaped insert bit 非球形硬合金齿钻头
tungsten insert bit 镶础化钨齿的钻头 ; 镶碳化钨钻头
journal bearing insert bit 轴颈轴承镶齿钻头
detachable insert bit 可卸镶刃刀头 ; 硬质合金活钻
gauge insert bit 保径镶齿钻头
Our company can supply: Diamond bit series, bi-center bit series, coring bit series, steel cone bit series, insert bit series, etc.
我公司可提供：金刚石钻头系列、双心钻头系列、取芯钻头、钢齿牙轮钻头系列、镶齿牙轮钻头系列等。
The insert and update methods are a bit more complex because they need to format the SQL statements with additional fields for the input data.
insert和update方法要复杂一些，因为它们需要使用用于输入数据的额外字段格式化sql语句。
Insert tooth bit applies in every serious geography especially hard rock; it has stable drilling speed and can drill the hardness of rock at 1-6 grades.
镶齿牙轮钻头主要适用于地质较硬的岩层，它钻进速度稳定，可以钻进1-6级地质硬度，适用于各种恶劣的地质环境。
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