joint wall的用法和樣例：
例句
- The copper is disseminated in small joint surfaces and cracks in the porphyries.
銅浸染在斑巖的細小節理面和裂隙中。 - The following definitions apply to any planar surface, e.g. bedding, fault, joint or cleavage planes, veins or mineral deposits.
以下諸定義適用于任何平面，如層面，斷層面，節理面或劈理面，巖脈或礦床。
