66 صفحهpdfASME B30.1:2015 Jacks, Industrial Rollers, Air Casters and Hydraulic Gantries Safety Standard for Cableways Cranes, Derricks, Hoists, Hooks, Jacks and Slings
ASME B30.1:2015
66 صفحهpdfASME B30.1:2015 Jacks, Industrial Rollers, Air Casters and Hydraulic Gantries Safety Standard for Cableways Cranes, Derricks, Hoists, Hooks, Jacks and Slings