Since its first patent in January 1876, Norwalk Compressor Company has designed, manufactured, and serviced its own positive displacement reciprocating gas compressors.是什么意思_Since its first patent in January 1876, Norwalk Compressor Company has designed, manufactured, and serviced its own positive displacement reciprocating gas compressors.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句