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西,或者叫西方,係指南同北中間嗰方向,同東相反。而正西係正南同正北正中間嗰方位,正西同正南或正北垂直,符號W,來自英文嗰West。用「真方位角」表示,係270度,符號270°,用「羅經方位角」,係N90°W或者S90°W。 西嗰相反方向係東。正西相反就係正東。 而今地圖,西就係左首。
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