变级压缩机变工况压缩机改变压缩级数以适应气量或压力大幅度改变需要的压缩机
A variable-stage compressor or a variable-condition compressor is a type of compressor that changes the number of compression stages to adapt to significant variations in gas volume or pressure
以上为机器翻译结果，长、整句建议使用 人工翻译 。