Carbon seamless steel pipes are divided into hot rolled and cold rolled (drawn) steel pipes.Hot rolled carbon steel pipe is divided into general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stai
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Wireless Telephone Disk Ferrite Magnet is a self-provided two dry batteries as the power supply, which is mainly composed of a transmitter, a receiver, a hand crank generator, an electric bell, a dry battery and other parts. And a telephone set with a mag
Aluminum extrusion casting, also known as "liquid die forging", is a method of pouring molten or semi-solid metal into a metal mold and then applying it to the original to solidify under pressure to obtain a blank or part.