广州齐昌与NOK公司长达20年的合作历程，专营摩托车各种油封、密封件，订购机械设备等油封。
Guangzhou Qi-chang company with NOK 20 years history of cooperation, specializing in a variety of motorcycle oil seal, seals, ordered machinery and equipment seals.
U型圈是液压缸中最常用的油封，它是一种典型的唇口密封件，无论用于活塞还是活塞杆都能获得良好的密封效果。
It's typical lip seal, which is able to gain good seal effect no matter in piston or piston rod.
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