His son dropped down his head and said, "Beside the plank and the Banks of the ditch, I can also see its bottom."
儿子低下头说：“是这样……除了木板和沟的两边，我现在还看见了沟底。”
The dissertation focuses on the study of tip and bottom Angle steel linking light steel frames with stomach plank angles.
本文主要针对带双腹板角钢的顶底角钢连接的半刚性连接轻型钢结构框架进行分析研究。
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