Internal flat seam construction to reduce pressure points.

外部单位煤层施工，以增加压力点。

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The flat seam: two pieces of fabric seam stitching, mutual complement cohesion. For the next long film parts etc…

平接缝：两块织物缝口拼接，互为衔接补充。用于接长衣片部件等。

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This paper demonstrates the optimization of the nearly flat seam underground coal mine planning by the multi-objective decision-making method.

文章采用多目标决策法进行近水平煤层矿井设计的最优化。

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For his twelfth birthday, Sandy had gotten a large, flat black portfolio made of hard cardboard that folded along a sewn seam and was secured at the top edge with two attached lengths of ribbon that he tied in a bow in order to fasten the leaves.

NPR: Roth Rewrites History with a 'Plot Against America'