What's the difference between railway multifunctional excavators and manpower?

The disadvantage of manual excavation is slow speed and low efficiency, and the advantage is flexibility, which is not suitable for overbreak and can control the elevation. Suitable for excavating common soil and cleaning foundation pit. Mechanical excavation of pits with deep defects and small area can not give full play to mechanical ability. Advantages: fast speed and high efficiency.

Excavators, also known as excavators, are earth-moving machines that use buckets to dig up materials above or below the bearing surface, load them into transport vehicles or unload them into the yard.