为了减少这种类型的服务器信息过载，WebSphere Portal现在支持一种客户端的编程模型，这种模型允许portlet状态在客户端更有效率地执行。
To reduce this type of server traffic, WebSphere Portal now supports a client-side programming model in which portlet state changes can be performed more efficiently on the client side.
过载保护装置：当过载发生时，运行下降，不允许上升，便于重物安全落地。
Overload protection: equipped self re-setting overload protector, the hoist motion is stopped if overloading occurs, but lowering is permitted, making the crane safe.
通常出现问题是过载或欠载引起的，但是在允许值之间的相对范围是比较宽的。
When problems occur, they are usually due to clear overloading or underloading; but a relatively wide range of operation is possible between these extremes.
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