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Precision Steel is a kind of high-precision cold drawn or hot rolled steel material after processing by. Because precision steel inner and outer wall oxide layer, to withstand high pressure without leakage, high-precision, high-quality finish, cold deformation, flaring, flattening without cracks, etc., so the main pneumatic or hydraulic components used in the production of products, such as cylinder or cylinder, which can be seamless, but also welded pipe.