球拍重的誤差?
上周末買了一把亞規blx6.1 tour 90(空拍標重319克)，
穿完線和上握把布後秤重為342.5克，
但我原本那把blade tour 93才336克(也穿一樣的線和握把布)，
理論上那把90應該重量330克出頭才是，
那這樣誤差合理嗎?
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