The Speedy Rail beam is a heat-treated aluminium alloy profile with hollow cross-sections that give it high strength under torsion and deflection stresses.
快速铁路是束热处理铝合金型材中空截面，给高强度下的扭转和挠度应力。
A barge's major deficiency is in the profile presented to the oncoming fluid that causes deflection and separation not the shape of the body following it.
驳船最大的不足之处是在提供的图中可以看到其使前方流来的水产生了偏转和分层而不是使水流按身体的形状流过。
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