In this paper, the experiment was designed to study tool with single coating layer and several coating layers.

通过多次实验，将单涂层与复合涂层硬质合金的刀具寿命作了比较。

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Professor Lin told CNN: "the anti-reflective coating requires multi-layer coatings which are slightly more complex than the typical single-layer ones."

林教授告诉CNN说：“抗反射层要求涂布多层，这比典型的单层要复杂些。”

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Radial lead coil, single or multi-layer winding on ferrite core, coating by epoxy resin. Products can be taped or packed in viny bangs.

径向引线固定电感器，在铁氧体磁芯上单层或多层绕线，环氧树造脂包封，包装形式可以编带也可袋装。

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"The anti-reflective coating requires multi-layer coatings which are slightly more complex than the typical single-layer ones, " Lin told CNN.

CNN: New nano coating boosts solar efficiency