substitute standard
... substitute rudder 应急舵 substitute standard 代用标准 substitute 代旗 ...
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代用ISO标准砂 substituted ISO standard sand
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随着石油的不断短缺及排放标准的提高，代用燃料发动机越来越受到重视。
Due to shortage of petroleum and enhancement of exhaust emissions standard, the substitute fuel engine has become more and more important.
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