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percutaneous transluminal coronary angioplasty [ptca]
通波仔

(ii) guidant is competing with boston in the fields of the medical devices which are used for percutaneous transluminal coronary angioplasty (hereinafter referred to as "ptca ") and the medical devices which are used for percutaneous transluminal angioplasty (hereinafter referred to as "pta ") out of guidant's main businesses.
guidant公司与波士顿公司在销售经皮冠脉腔内成形术(以下简称 "ptca ")领域使用的医疗器械方面进行竞争，然而， "ptca "使用的医疗器械已不属于guidant公司的主要商业经营业务。