Then we go to the sea park. We see some seals in a pool. They are playing with a beach ball.
后来我们又去了海洋馆。我们在一个池塘里看到许多海豹。他们在玩沙滩球。
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。
DAC series wheel bearing is a double row angular contact ball bearing incorporating an integral outer ring and two separable inner rings which is available with seals or without seals.
DAC系列轮毂轴承是由一个整体外圈和两个可分离内圈组成的双列角接触球轴承，有带密封圈和不带密封圈两种结构。
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