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上海通用机械技术研究所编印的《制冷用热力膨胀阀资料汇编》第1册已于十月底出版,其主要内容有: 1.热力膨胀阀的调节状态与充注
The first volume of “Compilation of Refrigeration Thermal Expansion Valve Information” compiled by Shanghai General Machinery Research Institute was published at the end of October. Its main contents are as follows: 1. Regulating state and filling of thermal expansion valve