gas extraction borehole 基本例句 钻孔 Point bars modeled in a North Texas gas field on the basis of borehole and seismic images.根据钻孔和地震图像建立的德克萨斯州北部某气田中的曲流沙坝模型。 The borehole must be drilled at correct place, and the gas pressure will be relieved.没有卸不了压的瓦斯,只有打不到位的钻孔。