Unverified85% confidenceDecision RuleTime unknown
坐圈内径需与家庭马桶匹配:成人马桶开口通常为O型(前后椭圆)和U型(前部开口)两类,购买前测量马桶开口内径宽度,坐圈内径应比马桶内径小2-4cm才能稳固卡住不下滑
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