MS of plasterer plastering wall using trowel. LACS of two workers attaching fluorescent light fixture to ceiling. CU of electrician's hand wiring fuse box. LAMSs of workers on scaffold, attaching fluorescent light fixture to suspensories. MS of young bricklayer aligning bricks he just laid. MSs of young apprentices listening attentively in trade school. LAMS of two workers fitting heating pipes in house.