独立发动机 meaning in English

self-contained engine

Cummins is in the list of us fortune top 500 , the largest independent engine manufacturer , powering more types of equipment in more markets than any other engine company , design , manufacture and market diesel and alternative fuel engines , filtration and exhaust systems , power generation systems and related components
康明斯是美国财富五百强企业，全球最大的独立发动机制造商，设计、制造和经销柴油和代用燃料发动机，滤清和排气系统，发电系统以及相关的零部件产品。