装于帆桁中央两侧的索具：能滑动的绳圈或链子，用来把帆桁或缆索拴在船桅上，使之仍可以随意升降。
A sliding loop of rope or chain by which a running yard or gaff is connected to, while still being able to move vertically along, the mast.
另外，支撑构件设置在扩散装置以及载具之间，而反射片是配置在载具以及扩散装置的两侧。
The support member is set between the diffusor and the carrier, and the reflecting plate on two sides of the carrier and the diffusor.
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