| fluid communication | 0.67 |
| comprise a one-way valv… | 0.36 |
| extend through sidewall | 0.25 |
| receive a delivery devi… | 0.25 |
| perform the t4 dna poly… | 0.25 |
| screw into the column | 0.25 |
| connected | 0.73 |
| closed | 0.68 |
| blocked | 0.62 |
| shown in fig | 0.44 |
| connected to different … | 0.41 |
| formed in the body | 0.36 |
| aligned | 0.36 |
| connected to an outlet … | 0.33 |
| coupled to main valve c… | 0.25 |
| shown | 0.25 |
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