Unverified80% confidenceTradeoffTime unknown
疏通器长度并非越长越好：家用洗手盆存水弯到主管道通常不超过3米，超过5米的弹簧在细管中易打结缠绕；只有蹲便/主立管才需要8-10米工具
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80%
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Long-term
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Unverified弹簧长度选择：洗手盆存水弯堵塞3-5米足够，厨房下水道横管建议5-10米，深度堵塞或主立管需10-15米，长度不足无法触及真正堵点90% similarUnverified疏通马桶需用直径9-12mm、长度3-5米的弹簧或专用马桶疏通器，普通细弹簧在马桶存水弯打转无法顶穿堵塞物83% similarUnverified厨房水槽和洗手盆下水堵塞多为油脂+毛发混合，优先选5米以上手摇弹簧疏通器（管径6mm钢丝）；马桶堵塞则用皮搋或专用马桶弹簧，两者不通用82% similarUnverified长柄缝隙刷（柄长15cm以上）适合水槽底、家电底部、马桶背面等需要伸展距离的场景；短柄迷你刷适合便携和精细控制，两者用途不可互替82% similarUnverified疏通厨房水槽下水管选直径6-8mm弹簧，管径通常40-50mm，弹簧太粗无法通过存水弯的S形拐弯82% similar
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