After the piston rod retracts for a definite distance, the oil return amount of an oil cylinder can automatically reduce to realize speed reduction effect to the oil cylinder.
当活塞杆回缩至一定距离后，油缸的回油量便自动减少，从而实现对油缸的减速作用。
After the piston rod retracts for a definite distance, the oil return amount of an oil cylinder can automatically reduce to realize speed reduction effect to the oil cylinder.
当活塞杆回缩至一定距离后，油缸的回油量便自动减少，从而实现对油缸的减速作用。
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