GB/T 42638-2023

The direct measuring method of the coal seam gas drainage radius in coal mine—Method of drainage volume

STANDARD published on 23.5.2023

English, Chinese -
electronic design (pdf) (406.80 USD)

The information about the standard:

Designation standards: GB/T 42638-2023
Publication date standards: 23.5.2023
Country: Chinese technical standard
Category: Technical standards GB