This depends on the estimation of the temperatures generated by frictional heat. 它取决于摩擦热所引起的温度估算。
This is a porous membrane because of the reason, to maintain cutting oil to reduce friction heat, to prevent wire into the attack surface effect. 此皮膜因是多孔质的原故，能保持住切削油减少摩擦热，有防止丝攻表面融着的效果。
