问题
填空题
对于内燃机，气门座是（）与（）的支撑面。其作用是与气门共同保证（），并导出气门头部的热量。
答案
参考答案：气缸盖上；气门锥面相配合；密封性能
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对于内燃机，气门座是（）与（）的支撑面。其作用是与气门共同保证（），并导出气门头部的热量。
参考答案：气缸盖上；气门锥面相配合；密封性能
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