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NTRODUCTIONTypeS1 95dieselenginesarewidelyusedinruralareasofChina.Thetotalnumberoftheen ginesusedinagricultureisabout8millionsets.Ourinvestigationsshowedthattheworkingcon ditionsoftheenginesinusearerelativelybadingeneral.Thenoiselevelisveryhigh .Tractorope… 相似文献
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