-
GB/T 13813-2023 in English
Testing method and judging rule of safety to friction spark of metallic material for coal mine
valid
Issued on:2023-05-23
$700.00 -
GB/T 41163-2021 in English
Specification for process design of enhancing coal seam permeability by water jet in coalmine
valid
Issued on:2021-12-31
$420.00 -
GB/T 41043-2021 in English
Coordinative development effectiveness evaluation indicator and method of coal and coalbed methane
valid
Issued on:2021-12-31
$476.00 -
GB/T 39988-2021 in English
Technical specification for total tailings paste production and disposal
valid
Issued on:2021-05-21
$308.00