实验证明，展开基点的选取和可展度的判别是提高曲面片展开精度的重要因素。
It is proved by test that the choose of developing basic point and the judge of development behaviour are important factors to improve the precision of development drawing.
国际殡仪展是亚洲一年一度的殡仪盛会，来自13个国家和地区的130个殡仪公司展出了形形色色的殡仪用品。
The expo is an annual event for funeral professionals with 130 companies from 13 countries and regions exhibiting all kinds of funeral products.
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