| http://www.w3.org/ns/prov#value | - In an embodiment particularly adapted for use in a production line environment, in which it is required to sequentially wet a plurality of lengths of tubing in rapid succession, pressure means are provided to apply pressure to the liquid 19 to urge the liquid 19 into the porous means such as the second block 25 and thence to the block 11 so as to rapidly re-wet the block 11 as often as desired, as
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