The application of pipeline inside coating anticorrosion technology to repairing old pipeline system is introduced.
介绍了一种风送涂挤防腐蚀工艺在修复油田老区旧管线中的应用。
Fluorescent lights use electricity to excite mercury vapor. This produces ultraviolet light that causes a phosphor coating inside the bulb to glow.
荧光灯用电激发水银蒸气。这会生成紫外线光而使得镀在灯管内壁上的磷涂层发光.
The seed has an outer coating that surrounds the genetic material of the new plant, and inside this covering is a concentrated supply of nutrients.
种子有一层外壳,包裹着新植物的遗传物质,外壳内部是集中的营养供应。
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