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See Chinese contents: GB/T 19494.1-2004 GB/T 19494.1-2004: Mechanical sampling of coal -- Part 1: Method for sampling
This Part of GB/T 19494 specifies the terms and definitions of mechanized coal sampling, the general principles and precision of sampling, the establishment of sampling scheme, the sampling method of moving coal streams, the sampling method of stationary coal, the packaging and identification of coal samples, and the sampling report.
