By offering instant discounts worth as much as $ 100, DeWalt launched a trade-in program to encourage people to bring back tools.

通过提供价值高达 100 美元的即时折扣， DeWalt 推出了一项以旧换新计划， 以鼓励人们带回工具。

For instance, DeWalt discovered that many contractors were holding on to their old tools, even f they no longer worked, because they were expensive purchases and it was hard to justify bringing them in to recycle.

例如，DeWalt 发现许多承包商保留着他们的旧工具，即使它们不再工作了， 因为它们的购买成本很高， 而且很难证明将它们带回回收利用是合理的。