Kong-hun (公分, hû-hō: cm) sī tn̂g-tō· ê SI tan-ūi.
1 cm téng-î:
- 1 m ê 100-hun-chi-it
- 1 dm ê 10-hun-chi-it
- 10 mm.
Chham-khó: Tan-ūi ê oāⁿ-sǹg-pió
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