?自动扶正型    self-righting type

?自动起动器    self-starter

?自攻螺钉    self-tapping screw

?免整平煤船    self-trimming collier

?免整平[散装]船    self-trimming vessel

?自动卸载机    self-unloader

?扫描电子显微镜    SEM (= scanning electron microscope)

?半组合曲柄轴    semi built-up crank shaft

?半组立式    semi built-up type

?半自动焊接    semi-automatic welding

?半平衡舵    semi-balanced rudder

?半烟煤    semi-bituminous coal

?半箱型梁    semi-box beam

?半闭式循环    semi-closed cycle

?半货柜船    semi-container ship

?半柴油引擎    semi-diesel engine

?半干坞    semi-dry dock

?半净钢    semi-killed steel

?半薄膜槽    semi-membrane tank

?半金属迫紧    semi-metallic packing

?半移动式灭火器    semi-portable fire extinguisher

?半门型起重机    semi-portal crane

?半钢性接合    semi-rigid type of joint

?钢性铸铁    semi-steel

?半潜式破冰液货船    semi-submarine ice- breaking tanker (SSIT)

?半潜式双胴体船    semi-submerged catamaram (SSC)

?半干坞    semi-submerged shipway (or semi-dry dock)

?半潜式钻油台    semi-submersible

?半潜式钻探船    semi-submersible type drilling rig

?半串行建造法    semitandem building system

?半翼叶片    semi-wing blade

?瑞典电机材料标准协会    SEMKO (= Svenska Elektriska Materielkontrollanstalten, Sweden)

?瑞典电机技士标准    SEN (= Svenska Elektrotekniska Normer-SIS, Sweden)

?发送装置    sending set

?鹈嘴形滑钩    senhouse (or pelican) slip

?高级工程师,高级轮机员    senior engineer

?高级船员    senior officer

?灵敏度,灵敏性    sensibility

?显热    sensible heat

?感测装置    sensing device

?精密比重计    sensitive hydrometer

?感光纸    sensitive paper