Conventional cold storage systems use semi-sealed pistons freezer heads, unit volume filling, and many mechanical parts, There are many EVI shortcomings and a high failure rate.
Zinc alloy die casting is a precision casting method that uses high pressure to force the molten metal into a metal mold with complex shapes. It is a precision casting method.
With the rise of black cardboard tag design, in the past ten years or more, since 2000, to be precise, the issue of environmental protection and sustainable development has been constantly mentioned.
PPR/AL/PPR pipe is a kind of composite pipe with outer and inside layer---polypropylene, middle layer---aluminum. With both advantages of ppr and aluminum. PPR/AL/PPR pipe can be darker than ppr pipes, can develop the features of polypropylene material---