由于像如砂岩和砾岩这样的沉积岩是多孔的，它们是地下水的重要潜在来源。
Because they are porous, sedimentary rocks, such as sandstones and conglomerates, are important potential sources of groundwater.
适用于中至中硬地层中使用，如砂岩、石灰岩及白云岩。
Suitable for medium to medium hard formations such as sandstone, limestone and dolomite.
适用范围：用于一般毛细空较大的石材，如砂岩和白沙米黄等。
Application: used for general capillary empty large stone, such as sandstone and white sands cream-colored, etc.
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