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1)PGO potential,ÇÅ-Ï¥-Õíµçλ

2)PGO wave,ÇÅ-Ï¥-Õí²¨

3)pon-genicular occipital spike,PGO spike,ÇÅÏ¥Õí·å

4)pon genicular occipital wave,ÇÅ-Ï¥-Õí²¨ª©ÇÅ-Ï¥-Õí²¨ªª

5)bridge sleeper,ÇÅÕí

6)corbel-bridge,ÕíÁºÇÅ

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Many constructions were badly damaged by the effect of freeze, this paper deals with a designing method of preventing corbel-bridge and corbel-sluice from damage by freeze.

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