| • impervious layer | |
| अप्रवेश्य: closed access impervious proof impenetrable | |
| परत: tier thickness lode film couch lamina shim ply | |
अप्रवेश्य परत अंग्रेज़ी में
[ apraveshya parat ]
| • impervious layer | |
| अप्रवेश्य: closed access impervious proof impenetrable | |
| परत: tier thickness lode film couch lamina shim ply | |
