2009LD/T 72.1-2008 Construction Engineering Labor QuotaConstruction Engineering-Material Transportation and Processing Engineering
1970LD/T 99.2-1997 Municipal engineering labor quota material transportation and processing
LD/T 99.2-1997 Municipal engineering labor quota material transportation and processing was changed to LD/T 72.1-2008 Construction Engineering Labor QuotaConstruction Engineering-Material Transportation and Processing Engineering.