main·sheet /ˈmenˌʃit/
大桅帆操縱索
main·sheet n. Naut. One of the ropes by which the mainsail is hauled aft and trimmed.
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mainsheet
n : (nautical) a line (rope or chain) that regulates the angle
at which a sail is set in relation to the wind [syn: sheet,
tack, weather sheet, shroud]