With one hand now always locked onto the handrail, I bemoaned and laughed about my predicament a little more.
一只手一直抓着栏杆，我边叹气边暗笑自己的推想。
THE MATH MODEL OF THE FITTING MACHINING BENCHMARK CURVE OF THE STONE SLICE USED ON THE HANDRAIL OF EDDIED LADDER
旋转扶梯石材贴片的加工基准曲线拟合的数学模型
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