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①螺栓拧上两个螺帽是为了增加它的夹紧力,当机器发生震动时,上面的那个螺帽不致使下面的那个螺帽松脱。②刨刀要作成弯头的,是因为:假如刨刀作成直头的,当刀头碰到硬的包留物而产生过大的切削力时,刀头就会弯曲,刀尖就要切入工件的表面。这样既会损坏了加工面,而且刨刀也有被损坏的可能。如果作成弯头的,就可以避免这种现象发生。③这样的孔在插入木手柄时,便会紧紧的包住它,如果在端头再打入一个楔子,那就更不会使锤头发生松动的危险。
① The bolts are screwed on two nuts to increase its clamping force. When the machine vibrates, the nut on the upper part will not loosen the nut below it. ② planing knife to make a bend, because: If the planing knife made straight, when the cutter hit the hard residue and leaving too large cutting force, the tip will be bent, the tip will cut into the workpiece surface. This will not only damage the machined surface, but also the planer may be damaged. If you make a bend, you can avoid this phenomenon. ③ Such a hole in the wooden handle inserted, it will tightly wrap it, if the tip into a wedge, it would not even make the hammer loose danger.