Khi chế tạo các cơ cấu kẹp chặt bằng cơ khí- thủy lực, phải chú ý đến các đệm làm kín trong xylanh thủy lực, vì nếu rỉ dầu mà không có bổ xung thì lực kẹp sẽ giảm.
When built the structures tightly clamping by mechanical-hydraulic, to pay attention to the sealing cushion in hydraulic cylinder, because if the oil leak without clamping force will decrease the replenished.
When fabricated structures khi- gripped by hydraulic motor, pay attention to the sealing cushion in the hydraulic cylinder, because if leaking oil without the additional clamping force will decrease.