黄铜 C35300 C37800 C38000
铍铜 QBe2 QBe1.9..
黄铜 C23000 C240..
黄铜 C35300 C378..
黄铜 C34700 C349..
黄铜 C27200 C280..
黄铜 C26800 C270..