双边的

The Internet offers an open platform for new E-commerce, removing the long lead times, asset specificity, and bilaterality of E-commerce based on the traditional proprietary EDI.

因特网为新的子商务提供了一个开放的平台，去除了漫长的交订货时间，资产管理专业知识和统专有子数据交换平台子商务的双性。

Such as the synchronization counter-rail and pressed compact for the edge smoothing tool,the press plate and wormgear for the line edging tool,the gear and the bear for the washing tool.

用双的同步带导轨、压块，直线的压板、蜗轮，清洗的齿轮、轴承等。