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一、美国英格索尔-兰德公司 压缩机产品系列的新发展＊ （一）固定式动力用空压机机组系列的变异 将图1与该公司1977年时的固定式动力用空气压缩机组系列构成（源出期刊《Proces-sing》,1977.6,P.61; 参看《化工与通用机械》,1978.9,第22页）相比较,便可发现:以往活塞式、螺杆式、离心式这三种类型的空气压缩机组,有机地构成完整的系列为其共同点,而其变异主要表现在以下三个方面。其一,新颖的SSR2000螺杆式空气压缩机组系列的研制成功,取代了原有的PAC-AIR螺杆式空气压缩机组系列,及原有的 AIR SQU-ARE往复活塞式空气压缩机组系列。其二,LLE往复活塞式空气压缩机组系列最大容量
First, the United States Ingersoll - Rand Company Compressor product line of new developments * (a) fixed-power air compressor unit variation of the series Figure 1 and the company in 1977 when the fixed-power air compressor unit Series "(Proces-sing, 1977.6, p.61; see Chemical and General Machinery, 1978.9, p. 22). In the past, the three types of piston, screw and centrifugal Types of air compressors, organically constitute a complete series of their common ground, and its variation mainly in the following three aspects. First, the success of the new SSR2000 screw air compressor unit series has been successfully replaced the original PAC-AIR screw air compressor unit series, and the original AIR SQU-ARE reciprocating piston air compressor unit series. Second, LLE reciprocating piston air compressor series maximum capacity