?信号 signal
?信号钟 signal bell
?蓝信号灯 signal blue light
?信号代码书 signal code book
?信号旗 signal flag
?信号灯 signal lamp
?手提信号灯 signal lattern
?信号符字 signal letters
?信号灯 signal light
?信号枪 signal pistol (or gun)
?红信号灯 signal red light
?火箭信号弹 signal rocket
?信号钟 signal bell
?蓝信号灯 signal blue light
?信号代码书 signal code book
?信号旗 signal flag
?信号灯 signal lamp
?手提信号灯 signal lattern
?信号符字 signal letters
?信号灯 signal light
?信号枪 signal pistol (or gun)
?红信号灯 signal red light
?火箭信号弹 signal rocket
?信号旗桁 signal yard
?[日光]信号镜 signaling mirror
?有义值 significant valve
?有义波高 significant wave height
?有义波周期 significant wave period
?消音器 silencer
?无声吹泄阀 silent blow off valve
?炉渣绵 silicate cotton (or slag wool)
?硅整流器 silicon rectifier
?硅钢 silicon steel
?贵重品室 silk room
?门坎 sill
?淤泥 silt
?银焊料 silver solder
?银焊 silver soldering
?银合金硬焊 silver-alloy brazing
?相似模型船 similar model
?相似性 similarity (or similitude)
?辛姆拉[客船]规则 Simla rule
?单式引擎 simple engine
?单涨式机 simple expansion engine
?单胀[动力]机 simple expansion engine
?单涡轮循环 simple gas-turbine cycle
?单缸泵 simple pump
?简支缘 simple supported edge
?简支格架 simple supported grillage
?单体法 simplex method
?单嘴喷雾器 simplex nozzle atomizer
?[舵]轴兼[舵]柱型舵 simplex rudder
?辛普生法则 Simpson‘s rule
