A.490 B.620 C.740 D.1100
A.6-8mmB.7-9mmC.10-12mmD.8-12mm
A.上下縫對齊 B.按美觀要求砌筑 C.錯縫搭接 D.砂漿飽滿均勻 E.砂漿按高度逐漸減薄