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- Ordinary法 Ordinary method
- ordinary leakage (保险) 通常漏损
- ordinary pitch (其值为37.5) 常用屋面坡度
- co-routine是一个可以在中途停止和在稍候在那停止的点上继续运行的子程序。 A co-routine is a subroutine that can stop in the middle, and start back up later at the point you stopped. For example