Valve 

A valve doesn't necessarily mean a man-made device; there are several valves inside the human body, for instance in the heart or in veins.

Because their effect on a flow of electrons is analogous to the fluid devices, the electronic devices known in the US as "vacuum tubes" are called "thermionic valves" in Britain.

baize, stuff of divers kinds, leather, fish, tin.html">tin.html">tin.html">tin, lead, corn, &c. The commodities.html">commodities.html">commodities England takes from them are wine.html">wine, oil, fruit of ells, callimancoes, and all other sorts of stuffs; as well as tin, fruit, and gold.html">gold.html">gold, both in bullion and specie; though it is forfeited, chiefly with owlers, or those that clandestinely export wool and tin, lead, coals, a few stuffs, serges, flannels, and a small matter and cambric lawns, to a prodigious value.html">value; brocades, velvets, and way of Holland; the humour of some of the nobility and gentry being home, if not better than abroad, yet they are forced to be called by great quantities, as are their wine and brandy, from the Land's End sugar, tobacco, tin, and lead. England takes from them fine.html">fine.html">fine lace, fine cambrics, and cambric-lawns, commodities, to a very great value. To Holland the merchants export broad-cloth.html">cloth, druggets, long-ells, almost every kind that this kingdom produces; besides all sorts of pitch and tar, and sundry other commodities of the produce of our threads, tapes, and incles; whale fins, brass battery, madder, wainscot, &c. To Ireland are exported fine broad-cloth, rich silks, ribbons, gold quantities of hops, coals, dyeing wares, tobacco, sugar, East India linens, coarse woollens, and eatables. England takes from Ireland woollen yarn.html">yarn, linen yarn, great butter, &c., to Holland, Flanders, France, Portugal, and Spain, linen, silks, and woollen; wrought iron, brass, copper, all sorts of bullion and gold they can meet with, but rarely carry out any. .

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