The ancient-dream was finally realized in 1940 when a Russian engineer piloted a strange looking craft of steel tubing with a rotating fan on top.

这个古老的梦想终于在1940年实现了。当时，一名俄罗斯工程师驾驶了一艘外形奇特、顶部装有旋转风扇的钢管船。

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Shoulder stock is made from thin steel tubing and folds forward and to the right.

肩的股票，从细钢管作出向前折叠的权利。

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The airframe is built of steel tubing, with aluminum wings, for a basic empty weight of 628 pounds.

该型飞机采用了钢管机身框架，铝制机翼，基本型空重628磅。

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Natural-gas pipelines cannot be used because hydrogen makes the steel tubing brittle and attacks the welds.

ECONOMIST: Tech.view

Cycling's innovations, including spokes, pneumatic tyres, ball bearings, steel tubing and differential gears, were soon borrowed by the motor industry.

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The structure is made of steel tubing and the body of aluminum.

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