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[generation light color] 40cm/standard non-slip(【一代浅色】40cm/标准防滑款) [second generation new color] 40cm/standard non-slip(【二代新色】40cm/标准防滑款) [generation light color] 40cm/classic with hook(【一代浅色】40cm/经典带钩款) [second generation new color] 40cm/classic with hook(【二代新色】40cm/经典带钩款) [generation light color] 40cm/upgraded with hook(【一代浅色】40cm/升级带钩款) [second generation new color] 40cm/upgraded with hook(【二代新色】40cm/升级带钩款) [generation light color] 43cm/anti-slip traceless(【一代浅色】43cm/防滑无痕款) [second generation new color] 43cm/anti-slip traceless(【二代新色】43cm/防滑无痕款) [generation light color] 46cm/strong load-bearing model(【一代浅色】46cm/强力承重款) [second generation new color] 46cm/strong load-bearing model(【二代新色】46cm/强力承重款) [light color of the first generation] 29cm/for babies and children(【一代浅色】29cm/婴童专用款) [second generation new color] 29cm/baby special(【二代新色】29cm/婴童专用款)