According to the NCC, the stair design formula 2R + G is used to assess the comfort and safety of stairs. In this formula, what does R stand for? 简答题

A

Rise

B

Risers

C

Riser

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In the formula 2R + G, which is used to determine the comfort and safety of a staircase, R stands for the rise of a step, and G stands for...

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