Are there any similar tools for measuring verticality and parallelism in ancient and modern times?

Lu Banchi, the full name of "Luban Building Ruler", is a measuring tool used in building houses, similar to the tape measure used by craftsmen today. Lu Banchi, about 42.9 cm long, is said to have been written by Lu Gongyun class in the Spring and Autumn Period. Later, it was added to the geomantic circle to measure the good and bad luck of houses and houses, which was called "door plan". Also known as "square", it has been widely used by craftsmen to check whether the planed plates, purlins and structures are vertical and whether the edges are at right angles.

Lu Ban invented many things. According to many ancient books, he invented many woodworking tools used by carpenters. Like a carpenter's ruler, it's called Lu Banchi. Another example is Mo Dou, umbrella, saw, planer and drill. Legends are all invented by Lu Ban. The invention of these woodworking tools liberated the craftsmen at that time from the original heavy labor, and the labor efficiency was doubled, and the civil technology took on a brand-new look. It contains the original knowledge of physics.