起重吊钩 第10部分:吊钩螺母
Lifting hooks-Part 10:Hook nuts
Lifting hooks-Part 10:Hook nuts
Lifting hooks-Part 1:Mechanical properties ,lifting capacities,stresses and materials
Lifting hooks-Part 15 :Laminated hooks with point
Lifting hooks-Part 13:Technical conditions for laminated hooks
Lifting hooks-Part 11:Securing plates for hook nuts
Tubular cored electrodes for non-alloy and fine grain steels
Silver brazing filler metals
Covered electrodes,wires , rods and tubular cored electrodes for fusionwelding of cast iron
Safety in welding and cutting
Safety production codes for presswork