... :5T 2.ISO9001:2008 3.a complete production equipment 4.We have our own testing equipment AISI 4140 steel bar 1. Grade: 4140 ... mould, precision plastic mould, like: cars accessies, home appliances, electronic equipment plastic mould Note:1. According to national standard (GB)for ... piece, bar, etc. 3. Our company is equipped with roll equipment and can provide our customers with roll billets or finished ...