软管有单层、双层，并分透明管、圆管、扁管。
There is a double-layer, hose , and transparent tube , pipe, pipe.
发光体3是在一透明塑料软管内两端部各装有至少一只发光二极管31，在发光二极管之间装有发光纤维32。
At least one light-emitting diode 31 is arranged in each end of the transparent plastic hose; luminescent fiber 32 is positioned between light-emitting diodes.
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