What evidence do we have now?

Now we have evidence of cross saw, Jigsaw, digging saw and sawtooth. There are many kinds of saws. According to its main uses, it can be divided into horizontal saws for sawing wood, Jigsaw saws for sawing wood along grain and digging saws, also known as wire saws, which are mainly used for sawing curved shapes.

According to the size of sawtooth, it can be divided into coarse sawtooth suitable for sawing larger and thicker wood, medium sawtooth suitable for sawing wood of general size and thickness and fine sawtooth suitable for sawing thinner wood, and it can be divided into frame saw and plate saw according to its shape. Saw is divided into big saw, double-chain saw, small saw, fish belly saw, circular saw, hand saw, bow saw and knife saw. The largest saw is 3 to 4 meters long.

From the scope of application, frame saws are still widely used to cut logs and log yards. Modern Egyptian saws are still used by carpenters to do fine work. Many different types of saws are made for different purposes. The main difference lies in the size and number of teeth. Large teeth with fewer teeth are suitable for work, and fine-tooth saws are used to cut more smoothly and smoothly.

A saw is a tool used to cut wood or other things that need to be processed. It consists of a saw blade and a saw body composed of irregularly arranged serrations.

Broadly speaking, it refers to a tool for separating objects by repeatedly moving multiple contact points arranged in a single row under great pressure. Different from knives and files, the common forms are woodworking saw, circular chainsaw, band saw, wire saw and so on.