?舵轮    helm wheel

?电焊面罩    helmet shield

?麻    hemp

?麻芯    hemp core

?麻绳    hemp rope

?麻填料    hemp-jointing (or packing )

?人字齿轮    herringbone gear

?人字艇底板(小艇)    herringbone planking

?赫(周/秒)    hertz (HZ)

?粗麻布    hessian cloth

?外差式变频器    heterodyne converter

?六角头螺栓    hexagonal head bolt

?高高潮    HHW (= higher high water)

?美国液压学会    HI (= Hydraulic Institute, U.S.A.)

?兽皮绳    hide rope

?高合金钢    high alloy steel

?高碳钢    high carbon steel

?高纤维素系(焊条)    high cellulose type

?高纤维素系焊条    high cellulose type electrode

?高周疲劳    high cycle fatigue

?高频发电机    high frequency generator

?高频率发电机,高周波产生器    high frequency generator

?高频率电动发电机    high frequency motor generator

?高氧化铁系(焊条)    high iron oxide type

?高升程阀    high lift valve

?高[电]压试验    high potential test

?高压    high pressure

?高压缸    high pressure cylinder

?高压引擎    high pressure engine

?高压加热器    high pressure heater

?高压轴封迫紧    high pressure seal packing

?高压蒸汽    high pressure steam

?高压柜    high pressure tank

?高压涡轮机    high pressure turbine

?高位海水吸入阀    high sea suction valve

?高歪斜螺桨    high skew propeller

?高速    high speed

?快干水泥    high speed cement

?高速切刀    high speed cutter

?高速钻    high speed drill

?高速引擎    high speed engine

?高速钢,风钢    high speed steel