它的标准沙发底座是黑色聚丙烯材料，用螺丝固定在钢架上。
Its standard feet are black polypropylene, screwed to the frames.
标准化适用于几乎所有类型的产品，从Web页面到螺丝刀都是如此。
Standardization applies to just about every kind of product, from Web pages to screwdrivers.
可使钢材承受更大的变形及压缩，可以加工更多更好地标准件，如台阶螺丝或变形量较大的螺丝等。
Can give the steel ability of the more deformation and compression, can process more and better standard parts, such as steps screws or other screws with large deformations, etc.
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