We desire to continue to cooperate sincerely with new and old customers home and abroad in excellent product, normol management, aggressive service.
玖玖公司愿以精良的产品、规范的管理、积极的服务，与国内外新老客户真诚合作，共创未来。
2
We have also analysed the ratio between tangential forces and normol forces with respect to both chip formation forces and friction forces. The ratio generally falls within the range of 0.2~0.59.