National reference standard for building hoists:
GB1102 Round Strand Hlau hlua
GB3811 Code rau Tsim Cranes
GB5972 Code of xyaum rau kev soj ntsuam thiab scrapping ntawm steel hlau hlua rau nqa machinery
GB6947 Test Code thiab Cov Txheej Txheem rau Lub Tsev Hoists
GBJ232 Code rau Kev Tsim Kho thiab Kev Txais Cov Khoom Siv Hluav Taws Xob Kev Txhim Kho Engineering
JJ12.3 General Technical Conditions for Welding Parts of Construction Machinery
JJ15 General Technical Conditions for Construction Machinery Assembly
