... 加工原煤 process raw coal 加工成型 machine shaping ;machineshaping 加工液 working fluid ...
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这种材料很容易用机器切割并加工成型。
加工成型的石英晶体的频率可从几十千赫兹到数百兆赫兹。
Quartz crystals are manufactured for frequencies from a few tens of kilohertz to hundreds of megahertz.
但是其高温脆性大,加工成型困难,至今得不到工业应用。
But its brittleness at high temperature and hard to machine limited its applications so far.
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