power press JH21 series,C frame, mechanical, steel welded body, fixed stroke, with dry clutch, overload protected, photographic Features:1.Steel welded body, tempering treatment or VSR(Vibratory Stress Relief), high rigidity, accuracy and stability;2.Vertical located crankshaft, compact structure;3.The crankshaft undergoes grinding treatment after high frequency quenching;4.Lengthened rectangular ...