viewimage.php?id=3db5c935ecd12bf4&no=24b0d769e1d32ca73cee83fa11d02831a8a865d070dfb053de17debb358b24e0f75a5db6a27b4f31765ee4990c0660f38224649457e1e9eb88c9d63fc5e70c4fbb43dc15ba0bb57d06624bd93385731daaeb9b9dff04b9

viewimage.php?id=3db5c935ecd12bf4&no=24b0d769e1d32ca73cee83fa11d02831a8a865d070dfb053de17debb358b24e0f75a5db6a27b4f31765ee4990c0660f38224649457e1e9be87c9db3c9fe55c4f03607dbcdfae1611482725e942cce9dae30a4ac6fdd8e3

a에는 c랑의 수직항력만 작용하지않냐
장력은 왜있는거지?

- dc official App