Unverified50% confidenceCautionTime unknown
真空吸盘式免打孔扶手仅适用于完整无缝的光滑瓷砖/玻璃墙面，瓷砖单块尺寸需大于吸盘直径且吸盘不能横跨砖缝，否则密封失效会突然脱落，绝不可用于起身时的主承重
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