18th April,2018, 5 grades of our company’s self-developed no-longitudinal rib thread steel resin bolt successfully got renewal of “safety certificate of approval for mining products” certificates, valid for 5 years. We firstly got this certificate on 9th April, 2013.
Certified grades are:
MSGLW-335/16、18、20、22、25
MSGLW-400/16、18、20、22、25
MSGLW-500/16、18、20、22、25
MSGLW-600/16、18、20、22、25
MSGLW-700/16、18、20、22
Post time: Apr-18-2018