positive hole

Conversion of positive hole to electron in the process of latent image formation

潜影形成过程中的空穴及其转换

Hole-Similar to a positive charge, this is caused by the absence of a valence electron.

空穴 - 和正电荷类似, 是由缺少价电子引起的.

The organic black positive gel ( BPG) drilling fluid was employed, combined with pipe-sticking prevention by solid and liquid lubricants and hole stabilization technologies.

采用有机黑色正电胶钻井液，并配合固体、液体润滑剂防卡和岩屑床控制以及井壁稳定技术，满足了高难度定向井的钻井施工要求。

The brief description is given of the positive ion polymer mud system. A preliminary study hasbeen conducted in slim-hole coal geologic drilling resulting in some perfect effects.

对阳离子聚合物泥浆系统作了简要介绍.并在小口径煤田地质钻探中作了初步应用研究，取得一定效果。