Unverified80% confidenceFactTime unknown
一体式缓降辅助圈（成人圈+儿童圈二合一）需匹配马桶盖安装孔距，主流孔距为标准间距约14-18cm，购买前需测量马桶后部两固定螺孔中心距，孔距不符会导致盖板无法安装或晃动
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80%
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Long-term
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Unverified儿童马桶圈需匹配马桶开口内径，普通V型/O型马桶开口内径多在14-18cm，选购前需实测马桶内圈前后距离与左右宽度，误差超过2cm会导致坐圈晃动或掉落85% similarUnverified选购前需测量马桶开口内径与长度，V型（前圆）马桶开口约35-38cm，U型（前方）约33-36cm，儿童辅助圈内圈需匹配，缝隙＞2cm易夹屁股或漏尿，＜0.5cm则安装困难84% similarUnverified儿童马桶坐便圈需匹配马桶开口尺寸：V型/U型马桶开口内长约35-38cm，O型约37cm，购买前测量马桶内圈前后长度，坐便圈内径应比马桶开口大1-2cm才能稳固卡住不下坠84% similarUnverified马桶辅助圈需匹配自家马桶口径：标准圆形口约37cm、V型/长条形口约42-46cm，购买前用软尺测量马桶圈内径，误差＞2cm会导致坐圈晃动或卡不住84% similarUnverified二合一坐便器的坐圈内径应与家用马桶匹配，通用款内圈开口通常为22-24cm，购买前需测量自家马桶开口尺寸，V型或U型马桶需确认坐圈边缘能稳定卡住不打滑83% similar
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