Crane grabs can be classified in different ways according to different standards, which mainly include:

Control method classification:

Mechanical grab: relies on the mechanical force of the crane to open and close.
Electric grab: driven by a motor, it can be operated independently without the need for a crane.
Hydraulic grab: The hydraulic system is used to drive the opening and closing of the grab, usually used for large-scale and high-efficiency operations.
Structural form classification:

Single-line grab: Usually used for light operations, relying on a single cable to control opening and closing.
Double-line grab: More powerful than single-line grab, two sets of cables are required to control the lifting, opening and closing of the grab respectively.
Multi-petal grab: usually has four or more petals and is used to grab bulk materials.

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