We are capable of manufacturingcarbide twist drills, step twist drills, straight flute drills, hole dilating drills, threeflute drills, combination drills;
可生产硬质合金麻花钻、阶梯麻花钻、直槽钻、扩孔钻、三刃钻、复合钻；
In general can be twist drill hole, but you should drill holes, step and then expanded to the required diameter.
用一般的麻花钻即可开孔，但应先钻小孔，然后步扩大到所需直径。
Step Four: Interlock your fingers, (thumbs should be on opposite sides), and twist again, this time, backs of fingers against palms.
第四步：双手手指相扣(拇指应该在相对的两侧)，手指指背对着另一手的手心，互搓。
Step Three: Twist palms with fingers interlaced, and rub between fingers.
第三步：双手手掌相对，手指交叉互搓。
Step Three: Twist palms with fingers interlaced, and rub between fingers.
第三步：双手手掌相对，手指交叉互搓。
应用推荐