small scaled and hollow piece

• 小型空心砌块

small scaled and hollow piece的用法和样例：

例句

1. The special laying mortar and core casting concrete are matching materials for small hollow concrete blocks in highrise buiding.
   专用砌筑砂浆及注芯混凝土是混凝土小型空心砌块砌筑高层建筑的配套材料。