He put his wiper control in a red metal box that on the outside had the words "For Engineering Tests Only. Do Not Open.".

他将刮水控制器放置在一个红色的金属盒子里，上面写道 “工程测试专用，切勿打开。”。

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To produce engineering plastics wiper blade in stead of metal materials can improve the brushing effect of products except simple process technology and low cost of products.

通过用工程塑料代替金属雨刮片组件，不仅生产工艺简单、产品成本低，而且可以改善雨刮片的刮拭效果。

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Metal Clad Wipers are designed to press-fit into open face rod wiper glands, with no need for snap-rings, face plates, or other retention devices to hold the wiper in the gland.

金属骨架雨刷器的目的是开面棒压入雨刷腺体，配合无单元戒指，花盘，或其他设备需要保留腺体举行的雨刮器。

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