ASTM A307 specification covers the chemical and mechanical requirements for three grades (Grades A, B, and C) of carbon steel bolts, studs, threaded rods with minimum tensile requirement of 60 ksi. However Grade C has been replaced by ASTM F1554 Grade 36
Introduction This machine is our latest design, please always keep updated. It can automatically form non-woven bags with loop handles. The finished bag does not need to be reversed. It is an ideal machine for producing winning bags, beverage bags, gift b