expansionsn.扩展(expansion的复数形式)
expansionn.膨胀;扩展;扩充
expansion sheet膨胀板
expansion joint伸缩接头
expansion limit增长限度
expansion curve膨胀曲线
expansion valve膨胀阀
expansion rivet膨胀铆钉
expansion plate伸缩板,膨胀板
expansion trunk膨胀深井
expansion hinge伸缩铰链
Expansion speed扩散速度