Safety 安全
Safety belt[band] 安全帶
Safety can 安全罐
Safety car [vehicle]安全汽車(有在出事故時保護乘客的裝置)
Safety catch 安全擋[鎖扣，拉手]
Safety chain 安全鏈,（油罐車）接地鏈
Safety coefficient[factor] 安全系數
Safety cylinder 安全缸
Safety door 安全門
Safety double glass 安全中空玻璃
Safety fence 防護柵欄
Safety glass 安全玻璃,不碎玻璃
Safety guard 安全罩
Safety harness 安全帶
Safety relay valve 安全繼動閥
Safety spark gap 安全火花間隙
Safety switch 安全開關
Safety valve 安全閥
Sand cleaner 噴砂清潔器
Sand cloth 砂布
Sander 砂光機
Sand mo(u)ld casting 砂型鑄造
Sand paper 砂紙
Sandwich glass 夾層玻璃
Sandwich material 夾層材料
Sanitizer 清掃車
Saxomat auto clutch 離心式自動離合器
Saxonia metal 鋅基軸承合金
Scaffolding 臺架
Scanning head 掃描頭
Scavenge oil pump 回油泵
Scavenger 清除劑；防積碳添加劑；掃氣泵
Scratch 拉缸
Scratch hardness 刮痕硬度
Screen 屏幕,屏蔽
Screened ignition 屏蔽點火
Screened wire 屏蔽電線
Screw base 螺口燈頭
Screw bolt 螺栓
Screw brake 螺旋制動器
Screw clamp 螺旋夾
Screw cutting machine 螺紋切削機床
Screw die 板牙
Screwdriver 螺紋旋具,螺絲刀,起子,改錐
Screwed bulb 螺口燈炮
Screwed socket 螺紋插座
Screw ga(u)ge 螺紋量規
Screw gear 螺旋齒輪
Screw gearing 螺旋齒輪裝置
Screw head slotter 螺釘頭開槽機
Screw hole 螺孔
Screw jack 螺旋千斤頂
Screw micrometer 螺旋千分尺
Screw nut 螺母
Screw (and) nut steering gear 螺桿螺母式轉向器
Screw pair 螺旋副
Screw pitch 螺距
Screw pitch ga(u)ge 螺距量規
Screw plate 搓絲板
Screw stud 雙頭螺栓,螺柱
Screw tap 絲錐