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This paper introduces the preparing method, the structure, the properties and applications of poly (trimethylene terephthalate) (PTT), and it compared with PET, PBT et al. engineering plastics.

本文介绍了聚对苯甲酸酯(PTT)的制法、结构、性用,并和PET、PBT等工程塑料进行了比较。

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Osmosis-血液肿瘤

Diagnosis of hemophilia A and B usually starts with lab tests including a platelet count which is usually normal, a prothrombin (PT) time, and a partial thromboplastic (PTT) time.

血友病A和B的诊断通常是进行测,包括血小板计数(一正常)、凝血酶原时间(PT),以凝血活酶时间(PTT)。

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Osmosis-血液肿瘤

There is also a prolonged prothrombin (or PT) time, as well as prolonged partial thromboplastin time (or PTT), both of which reflect having lower levels of circulating coagulation factors.

凝血酶原(PT)时间和凝血活酶(PTT)时间均会延长,两者都反映出血液循环中低水平的凝血因子。

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