we offer plywood woodworking pre-press machine. all kinds of size, pressure cold press can be optioned, 400t, 500t, 600t, 800t and so on.pre-press is also called cold press which is used in pre-press process of plywood, blockboard production.there are two working ways, one the top-cylinder, one is downside-cylinder.there two working ways can be optioned by customer.strong body structure, and enough thickness steel plate, good quality cylinders, the top hydraulic unit system.