软锰矿是生产硫酸锰的重要原料，世界上约60%的硫酸锰由软锰矿加工制得。
Pyrolusite is an important raw material of preparing manganese sulfate, and about 60% manganese sulfate was produced by pyrolusite.
如由铅、锡、锰、镍、铁、硅组成的铜合金。
If by lead and tin, manganese, nickel and iron, silicon composed of copper alloys.
高锰奥氏体钢随温度降低其断裂机制由韧窝状断裂转变到晶界断裂。
High manganese steels undergo a ductile to brittle transition at low temperature, which is accompanied by a change in the fracture mechanism from dimple fracture to intergranular fracture.
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