前提要求就是，具有向心加速度，朝这个方向，向心力的作用。
There is a requirement that there is a centripetal acceleration, which is in this direction, a centripetal.
渗入水由大气降水和地表水的渗入产生，受重力作用由盆地边缘向盆地中心呈向心流。
While infiltration water generated from filtration of meteoric water and surface water flows from basin edge to its center in gravity -induced centripetal flow.
结论外置支架支撑作用能防止胆肠吻合口瘢痕过度增生，避免产生向心挛缩。
Conclusion External stent's eyelid can prevent the scar of exceeding hyperplasia in duct jejunum anastomotic stoma so as to avoid concentric contraction.
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