Specifications:
The document provides detailed specifications for the 'PH' series double acting crutches, including various models such as PHE5070300, PH6080350, and PH70100400. Key parameters include dimensions (A, B, Z, T, etc.), BSP thread size, volume in liters, and weight in kilograms. For example, the PHE5070300 model has a volume of 1.15 liters and weighs 22.9 kg.

Characteristics:
The 'PH' series features a double-acting mechanism, a swivel plate for better adaptation to uneven grounds, and double oil inlets to facilitate connections. An optional check-valve set is available.

Design Features:
The design includes a swivel plate to enhance stability on uneven terrain and double oil inlets for easier connection setup. The optional check-valve set provides additional functionality.

Models and Variants:
The document lists multiple models with varying specifications, such as different diameters and lengths, to cater to diverse application needs. Each model is designed to meet specific requirements in terms of volume and weight.

Applications:
These hydraulic crutches are suitable for applications requiring stability on uneven surfaces and efficient hydraulic connections.