减压阀compressionreliefcam: 调压凸轮compressionrefrigeratingmachine: 压缩式制冷机compressionring: 压缩活塞环compressionrefrigeratinginstallation: 压缩冷冻装置compressionriveter: 风动铆钉枪; 气动铆机下载手机词典可随时随地查词查翻译