Self-adjusting stem seals automatically 自动自我调节阀杆密封
Bearings: Self lubricating, built in wiper seals, Frelon teflon coated available.
轴承：自润滑，密封在雨刮，黄蜂聚四氟乙烯涂层可建成。
Self-aligning ball bearings of the mean diameter range are also available with seals (Figure 1.6) and a for-life grease fill.
平均直径变动的调心球承也可带密封（图1.6）和一个终身油脂填充。
According to Barnant, the pumps are self-priming, can operate dry without damage, are suitable for slurries and viscous liquids, and contain no valves or seals.
泵是自我启动式的，可以进行空转，并不带来任何的损耗，非常适合于泥浆和胶黏性液体，不带有阀门和密封。
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