For example, I can add my brother as my companion now, and after our flight, change my companion to my sister and add her as a companion on a ticket. After the flight with my sister, same /same â I can then change my companion and book the next companion ticket.
Architectural drawings are made according to a set of conventions, which include particular views (floor plan, section etc.), sheet sizes, units of measurement and scales, annotation and cross referencing.
Drawings depicting plumbing systems, especially drain waste and vent systems, frequently include isometric drawings. Isometric drawings are perspective drawings where vertical sections are depicted as vertical lines, and the horizontal lines conforming to the building North, South East and West lines are at a 30 degree angle above or below horizontal.