... and SGS certificationGOOD PAINTINGUSED FOR: QTZ80, T5020,T6018,F0/23B,T6015,H25/14L44A1 1.6m*1.6m*3m angle ... strictly.General introduction of tower crane main mechanisms .( 1 ) Main raw material of tower crane’s body and tower-cap are 16Manganese, ... ) Basic mast section : square strengthened steel, repeatedlyapplicable, convenient in tower crane displacement. But lower in cost.( 10 ) Mast section : 3 ...