To survey the historical materials of Song new music system as well as ones of the foundry bronze bell set that time can reveal their relationship.
作为固定音高的青铜乐器 ,编钟的铸制与音律设计、音高调试 ,成为宋代新乐议制和推行的重要物质基础。
Pulverized coal ash (PCA), after having been trated with silane coupling agent, can be used as a filler in nylon-6 castings, for improving water absorbability, contraction, thermal stability, etc.
将粉煤灰用硅烷偶联剂处理后填充到尼龙6浇铸制品(MC尼龙)中,可以改善制品的吸水性、收缩率及热稳定性等,还可以降低成本。
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