| Answer | Crossword Clue |
|---|---|
| proppants | PROPPANT, sand or similar, used to keep fissures in an oil-bed open |
| Answer | Crossword Clue |
|---|---|
| proppants | PROPPANT, sand or similar, used to keep fissures in an oil-bed open |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.