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pilot hole
释义
pilot hole
Encyclopedia
理学
地质钻孔
释
pilot hole
先导孔
在钻深孔或超深孔之前,在深孔或超深孔孔位附近钻的一口直径相对较小、深度相对较浅的钻孔。“双孔方案”中首先施工的钻孔。
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evolutionary time
evolutionary time hypothesis
evolutionary time-scale
evolutionary track
evolutionary tree
evolution centre
evolution diagram
Evolution Drama Society
evolution equation
evolution inclusion
evolutionism
evolutionist ethics
evolution mass
evolution matrix
evolution model
evolution network
evolution of airport engineering
evolution of Antarctic bottom water
evolution of Antarctic circumpolar current
evolution of clustering
evolution of coal property
evolution of east Asia river system
evolution of galaxies exploration
evolution of increased competitive ability
evolution of inflation
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