(a)   is a binder that hardens and binds materials together in construction.

(a)   are usually made of clay and have been used since ancient times.

CHB stands for what?

(a)  

(a)   blocks are used in joining the corner.

(a)   blocks are used at the two ends when the corner is visible.

(a)   blocks are used for the provision of a beam and are placed on the top portion of doors and windows.

(a)   blocks are used at the end of corners and have a round edge at one corner.

Masonry in carpentry refers to the integration of (a)   with wooden structures in construction.

Roughing up tools is necessary for (a)   , arranging, forming, laying, and shaping bricks, stones, and masonry blocks.