How long was the E-bow in the 1950s?

A bow is five feet, which is 1.65 meters.

Bow, measuring instrument and length unit 1 bow = 5 city feet 1 city feet = 0.33m 1 bow = 0.33m× 5 = 1.65m, one bow and five feet, 360 bows and one mile.

Bow: Measure the number of positions. On the Degree of Earth, two feet is one cubit, four cubits is one bow, and three hundred bows are one mile. Three hundred and sixty steps is a mile, which is three hundred bows. "The Story of the Western Regions" drum villain heard 500 bows. Note: 500 bows, two and a half miles.

In ancient times, the unit of measurement for measuring land was one bow and five feet, and 360 bows and one mile.

Because in the past, rulers in different dynasties had different sizes. According to the Republic of China Weights and Measures Law of 1929, the unit of length is: 1 Li = 150 sheets, 1 sheet = 10 feet, 1 step = 5 feet; Accordingly, a bow (step or fork ruler) is about 1.65 meters.