论文部分内容阅读
据美国Thread Forms公司声称,其TiN涂层螺纹塞规比普通钢制螺纹塞规的寿命高达15倍。操作者还可以根据塞规的金黄色直观地
Thread Forms, Inc. of the United States claims that its TiN-coated thread plug gauges have up to 15 times longer life than ordinary steel thread plug gauges. The operator can also visually inspect the golden yellow according to the gauge