And HP has only one undisputed jewel: the business of selling replacement ink cartridges for its printers at profit margins of about 80%.

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。

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Today tech companies like Sirius, TIVO and HP sell their products on the cheap so that consumers can subscribe to their satellite radio and TV services or be forced to purchase an endless supply of replacement ink jet printer cartridges.

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