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介绍ＷＡＢＣＯ公司新研制的Ｅ／Ｌ—Ｘ型货车二级空重车调整阀的结构、作用原理，及其主要性能和试验研究情况。
This paper introduces the structure, principle of action and its main performance and experimental research of the newly developed E / L-X truck empty-weight truck regulating valve developed by WABCO Company.