... ensure the cylinder runs smoothly .When the seam welding machine is working, which must keep give water , strictly prohibit no water to ... and the low die must neat; otherwise the barrel body is easy to crack.When rolling singlereinforcement,,the three-reinforcements die ... , must choose 0.6-0.8Mpa, the power is above 2.2w.Compressor working environment must ensure clean, and prevent the large ...