半密封的 semitight
半密封螺杆式 Half seals completely screw type
半密封瓷基板电位器 semi-sealed porcelain basic plate potentiator
半自紧密封 [机] semiautomatic seal
半导体密封剂 semiconductor encapsulant
半球形密封 domed seal
半封密冷冻压缩机装置 semi-hermetic refrigerating compressor unit ; hermetic refrigerating compressor unit
密封圈半径 Seal radius
半晶体密封继电器 half-crystal can relay
大直径的液压缸，通常是收缩，迫使闸板的两半一起向中间运动去密封井眼。
Large-diameter hydraulic cylinders, normally retracted, force the two halves of the cover together in the middle to seal the wellbore.
厨房：厨房门则应选择防水性、密封性好的门型，以便有效阻隔做饭时产生的油烟，如带喷沙图案、或半透光的半玻璃门。
The kitchen door: the kitchen should choose waterproof, sealing good door, in order to effectively block type of cooking fume sandblasting, such as design, or half light and glass.
提出造成气膜端面密封角向摆动自振的内在机理，既有半频摆动自振又有角向气锤自振。
It is posed that angular air-hammer self-excited vibration and half frequency wobble self-excited vibration are two reasons for resulting angular wobble self-excited vibration for gas film face seals.
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