青岛百思精密机械有限公司
Qingdao Best Industrial Supply Co., Ltd has been specializing in thread calibrating solutions in Oil and Gas more than 20years, we are not only suppling API standard thread gages and instruments, but also custom gages and speical measuring tools according to customer requirement. Welcome you to send us enquiry and we will provide the qualified services as we always do.
Website：www.chinabestools.com