零件的中心轴附近存在缺陷和孔隙，因此仅适用于能将这些机加工去除的零件。
The center axis of the part has inclusion defects as well as porosity and thus is suitable only for parts where this can be machined away.
有利的储集相带为水下分流河道砂体和河口砂坝中心的溶蚀孔隙相和绿泥石胶结相。
The favorable reservoirs are dissolution pore facies and chlorite cement facies in the sand bodies of subaqueous distributary channels and center of river mouth sandbars.
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