Pyrolusite is an important raw material of preparing manganese sulfate, and about 60% manganese sulfate was produced by pyrolusite.

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。

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Preparing mechanical data sheet, technical specification, material requisition MR for inquiry and preparation of requisitions for purchase.

准备机械设备数据表，技术规格书和材料请购单以用于设备询价，并准备订购版请购单。

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The method overcomes the shortcoming of grain growing above the initial crystallization temperature in annealing method, successfully preparing nano-crystalline material of very small grain .

该方法避免了传统的退火法在晶化温度以上晶粒长大这一缺点，成功制备出晶粒极细小的纳米材料。

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But popular groups not quite big enough to make the "Rock Band" playlist are also preparing material for the do-it-yourself upload store, including Creed and Evanescence, each of which has sold tens of millions of albums in the past decade.

WSJ: MTV Games Seeks Buzz for 'Rock Band'