预成型机 meaning in English

preform machine
preformer
preforming machine

Vacuum compression molding machine , vacuum type oil seal compression molding machine , pharmaceutical rubber stoppers molding machine , precure machine , preformer ( precision rubber slicer , oil seal rotation testing machine , cutting machine … etc
真空橡胶成型机,真空油封橡胶成型机,丁基胶瓶塞专用成型机,平板加硫机,预成型机(精密橡胶切片机) ,油封回转试验机,修边机…等。