(1) Chain-type grab: Modified from a bulldozer, this type of grab can reach excavation depths of up to 20 meters and is primarily used for excavating extremely hard and thick rock strata.
(2) Hydraulic grab: The hydraulic grab is a common piece of equipment in modern mechanized construction. It utilizes hydraulic power to enhance operational efficiency and offers advantages such as flexibility and portability.
(3) Articulated-arm grab: This is a versatile piece of construction machinery equipped with various types of grapples for excavating and transporting materials such as bricks, rebar, timber, and stone. The grapples can be interchanged to suit specific operational requirements.
(4) Other types: There are also less common types of grabs, such as soil-cutting grabs and diaphragm wall grabs.