【机械工程】换气泵【机械工程】清扫泵

scavenging

scavenging

scavenging

unidirectional scavenging cylinder scavenging

cross scavenging【动力】;crossflow scavenging【动力】

loop scavenging

scavenging port

purified air【环境】;scavenging air【环境】