Participate in the drafting of industry standards for

2017-06-21 00:00:00




    In 2008, CL ROCK participated in the drafting of " Standards of the building materials of the People's Republic of China - color sand for asphalt shingle ", Standard No .: JC / T 1071-2008, the record number: 22941-2008 (2008-02-01 release, 2008-07-01 Implementation).

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