(1) in accordance with the designs of doors and Windows in the installed position, size and elevation, measured out door edge according to door and window on both sides of centerline. For multilayer or tall buildings, is subject to top level Windows and doors line, line or transit under the door and window edges, and line at the doors and Windows on each floor, not directly to individual's mouth should pick your cut.
(2) the horizontal position of the window please refer to the floor level of indoor +50cm up against the window height, find direct line. Each layer must be kept consistent elevation under Windows.
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