4. The forming frame is made of cast iron and tempered. High strength and long service life. 4.成型機架爲鑄鐵結構,並經回火處理。強性高,使用壽命長。 Our company has perfectly designed a complete set of fire hydrant box, fire extinguisher box, base box, open box, concealed box, PZ30, multimedia box profile forming equipment. 3.床身爲鋼闆焊接件。並作回火處理,消除内應力、避免機身的變形。