It would be good to have a set of different blades to the hose for irrigation, including end nozzle in the form of a slot: it has its advantages. And most importantly — this is easy to do from the existing tubular scraps. It is enough to insert one end of the tube a metal wedge and pound it in with a hammer: get the desired slit opening, the amount of which will depend on the thickness of the wedge.
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AND AGAIN NUTRIT
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What is usually associated the term "straight-through"? Of course, with aircraft jet engines to achieve the highest supersonic speeds. And how can become a propulsive ship ...? This is...
