A nested multilevel structure of BOM is presented to describe the construction of product and halfproduct, which actualizes the mutual alteration in the BOM designing.
该模型采用多层嵌套BOM表的方式描述产品的结构，实现了产品、半成品BOM的灵活的联动设计。
2
Production of British cotton goods increased sixtyfold, and cotton cloth became Great Britain's most important product, accounting for one-half of all exports.
英国的棉织品产量增加了60倍，棉布成为英国最重要的产品，占出口产品总数的一半。
3
Yet surprisingly, no one has come in to undercut them and offer a comparable product at half the price.