| 摘要 |
A soils testing apparatus has a hollow shaft for insertion into a test hole and includes vertically adjustable wedging blades slidable and T-tracks on the shaft for centering alignment in the test hole. A hand pump evacuates water from the test hole to a predetermined null point whereupon vertical movement of a float and float rod supported and guided within the shaft over a finite period of time will yield a direct percolation absorption rate.
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