🌠性做久(jiu)(jiu)久(jiu)(jiu)久(jiu)(jiu)久(jiu)(jiu)久(jiu𒆙)(jiu)久(jiu)(jiu)免费看(kan)-精品少妇一区二区三区免费观(guan):
08-15
Operating conditions for injection molding of rubber and plastic molds
1. Off mold pressure: In principle, it should be greater than the total pressure of the plastic injection mold, based on no flash.2. Pressure and speed have some of the same contact effects in the mol