半潜式钻井平台 semisubmersible drilling platform ; semisubmersible platform ; semi-submersible rig ; semi-submersible drilling unit
半圆钻 half-round drill
半潜式钻油台 semisubmersible drilling rig
半潜式钻井架 semi-submersible drilling rig
半潜式钻机 semisubmersible rig ; semisubmersible drilling unit
半潜式钻探平台 semisubmersible drilling platform
半潜式钻探船 semi-submersible type drilling rig
半万能摇臂钻床 [机] semi-universal radial drill
半潜式钻探设备 semisubmersible drill rig
半潜式钻井装置 semi-submersible drilling unit ; semisub drilling unit
随着技术的进步，半潜式钻井平台和钻井船不断更新换代，额定作业水深和钻深能力相应增大。
Continued technological advances are pushing the rated depth of underwater operation and drilling capacity to record highs.
针对不同的加工要求，我们研制几款钻型精孔钻、半孔钻等以满足加工要求。
To meet different needs of processing holes , several kinds of jigs have been developed such as high-precision-hole jig, half-hole jig etc.
而半波数则与钻柱长度、几何参数，材料性质及地层弹性系数有关。
The Numbers of half wave are related with the length of drill stem, the nature of geometry and material of drill stem and the rock coefficient.
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