辅助充气约束系统?    supplemental inflatable restraint (SIR)

辅助约束系统?    supplemental restraint system (SRS)

供油管?    supply pipe

面容比?    surface to volume ratio

燃烧室口径比?    surface-volume ratio of combustion chamber

喘振?    surge

喘振线?    surge line

抽气量?    swept volume

车厢可卸式汽车    swept-body dump truck

摆臂式自装卸汽车?    swept-body dump truck

涡流比?    swirl rate

旋流管式空气滤清器?    swirl tube air filter

同步驱动皮带?    synchronous belt

同步驱动皮轮?    synchronous belt pulley