UDC中华人民共和国国家标准C{;BPGB/T51277-2018矿山立井冻结法施工及质量验收标准Standardforconstructionandacceptanceofcoalmineshaftoff...
GBT51277-2018 矿山立井冻结法施工及质量验收标准高清版.pdf
GBT51277-2018 矿山立井冻结法施工及质量验收标准.pdf
矿山立井冻结法施工及质量验收标准Standardforconstructionandacceptanceofcoalmineshaftoffreezingmethod2018-01-16发布2018-09-01实施UDC...
