Despite interlocking import quotas, tariffs, and nontariff barriers, the share of apparel sold in the united states that are imported rose from about 50% in 1999 to about 75% today.
An interlocking is a configuration of signal equipment used in railroad signalling to stop opposing movements at intersections or crossings of tracks. An interlocking plant is a term that is occasionally used to refer to both the signalling devices and the rails. A signal to advance cannot be displayed at an interlocking unless the intended path has been determined to be safe. Connected in a way that the components coordinate their actions to function as a single unit.
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