使用好的密封或保持护罩是避免润滑脂由轴承配置漏出的先决条件。
The use of a good sealing or retaining shield is a prerequisite to prevent grease leaking from the bearing arrangement.
防护罩组件(40)包括轴(12)和可随轴旋转的防护罩(40)，防护罩位于叶轮和轴承组件(26)的中间。
A shield assembly (40) includes the shaft (12) and a shield (40) rotatable with the shaft and positioned intermediate the impeller and the bearing assembly (26).
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