Screw type (S-type): Utilizes twin screws for force amplification, resulting in a compact structure, excellent sealing, and the strongest corrosion resistance.
Gear type (J-type): Employs spur gear transmission, offering high efficiency and a short lever stroke, but with a relatively complex structure.
Model Example: In HAL-1.0A, H represents hoist, AL represents aluminum alloy, 1.0 represents a rated load of 1 ton, and A is the design serial number.