欧美国产大片在线_日韩一区二区三区午夜影院_在线免费看成人毛片_3dh动漫无码中文_国产成人亚洲精品无码车A边_丁香五月激情综合国产_公的粗大挺进了我的密道视频_少妇人妻系列无码视频专区_晚夜禁用十大亏亏_91在线亚洲第一区精品

The properties of the alloy include two aspects: service performance and technological performance. …

1. Application of mould cooling system. When the cooling water is used correctly, it not only prolon…

Foundry is an important part of our modern technology. The effect of casting products is very good. …

Die-casting alloy is one of the key factors in the production of die-casting. In order to produce go…

1. Stomata.Causes: the exhaust duct is not smooth; sand moulds and cores are not dry.Prevention meth…

In the process of solidification and shrinkage, the alloy is prone to crack because of excessive ext…

In the process of production, die castings will encounter many quality problems, which are common qu…

Zinc-aluminium die-casting is a kind of powder die-casting parts with zinc as the main component. Th…

1. Considering the wall thickness, the excessive thickness gap will affect the filling.2. Consider t…

Aluminum die-casting is a kind of die-casting parts. It is a mechanical die-casting machine equipped…

Aluminum alloy die-casting is a kind of die-casting parts. It is a mechanical die-casting machine eq…

Pressure casting is a special casting method with little or no cutting in modern metal processing te…