并且惠普只有一件毫无争议的法宝：利润率约80%的打印机更换用墨盒的销售业务。
And HP has only one undisputed jewel: the business of selling replacement ink cartridges for its printers at profit margins of about 80%.
例如，售卖打印机的薄利可以通过绑定利润更高的墨盒一起销售而得到弥补。
Thin margins on sales of printers, for example, can be made up by bundling in more profitable toners.
难怪本周惠普会起诉另两家销售填充墨盒的公司了。
No wonder HP this week sued two other companies that sell refilled ink cartridges.
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