?单行铆    single riveting

?单列铆接    single riveting

?单螺桨船    single screw ship

?单螺桨船    single screw vessel

?单面剪    single shear

?单侧板式叶轮    single shrouded impeller

?单边[频]带发送    single side-band trans- mission (SSB)

?单级    single stage

?单级压缩机    single stage compressor

?单级泵    single stage pump

?单吸[口]泵    single suction pump

?单拐曲轴    single throw crank shaft

?单线系统    single wire system

?单动式引擎    single-acting engine

?单缸机    single-cylinder engine

?单层甲板船    single-deck vessel

?单头锅炉    single-ended boiler

?单管设备    single-hose rigs

?单丁形[焊]槽    single-J groove

?单脚螺桨架    single-leg propeller strut

?单极双投开关    single-pole double-throw switch

?单极单投开关    single-pole single-throw switch

?单口滑阀(往复机)    single-ported slide valve

?单侧吸式叶轮    single-sided impeller

?单板结构    single-skin construction

?水槽,缩流,汇流(流体力学)    sink

?下沈    sinkage

?深水泵,沉入式泵    sinking (or submerged) pump

?浮沉式软管    sinking and floating hose

?下沈速[率]    sinking speed

?舷门装卸机    siporter

?圆密尔    sircular mil

?汽笛    siren (or syren)

?臭氧换气系统    sirrocozone system

?瑞典国家标准    SIS (= Svenska Standard, Sweden)

?琼麻绳    sisal rope

?迭钩,姊妹钩    sister hook

?迭钩    sister hook

?副内龙骨    sister keelson

?姊妹船,同型船    sister ship

?现场焊接    site welding

?填角焊尺寸    size of fillet weld