Safety grooving was first experimented with at NASA's Langely Research Center in the 1960s as a way to improve safety for aircraft taking off on wet runways.
安全槽最早由NASA的Langely研发中心于1960年代进行试验，最初它的目的是改善航天器窄潮湿路面降落时的安全性。
Safety grooving was first experimented with at NASA's Langely Research Center in the 1960s as a way to improve safety for aircraft taking off on wet runways.
安全槽最早由NASA的Langely研发中心于1960年代进行试验，最初它的目的是改善航天器窄潮湿路面降落时的安全性。
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