钎具类型钎头直径合金片（柱）（mm）螺纹水孔系列号mmin边齿芯齿边齿角球齿钎头平面型标准式3811/2"4×82×830°25R3Q638-25R41139/64"4×82×830°25R3Q641-25R42121/32"4×82×830°25R3Q642-25R45149/64"4×82×830°25R3Q645-25R48157/64"4×82×830°25R3Q648-25R512"4×82×830°25R3Q651-25R3811/2"4×82×830°28R3Q638-28R41139/64"4×82×830°28R3Q641-28R42121/32"4×82×830°28R3Q642-28R45149/64"4×82×830°28R3Q645-28R48157/64"4×82×830°28R3Q648-28R512"4×82×830°28R3Q651-28R3811/2"4×82×830°32R3Q638-32R