以下为句子列表：
英文: A pneumatic tourniquet with a hand pump and an accurate pressure gauge is probably the safest, but a constantly regulated pressure tourniquet is quite satisfactory if it is properly maintained and checked.
中文: 具有手动加压泵及精确气压表的充气止血带可能是最为安全的，但是只要正确保养和检查，持续调压式止血带也相当满意。
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英文: A tourniquet should be applied by an experienced person and not delegated to someone who does not understand its use.
中文: 止血带的应用必须由有经验的人来进行，而不能交给那些不懂它的用法的人来代替操作。
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英文: An electrocautery unit is even more useful in surgery where a tourniquet cannot be employed, such as the shoulder, hip, spine, and pelvis.
中文: 尽管肢体暂时缺血而不会出血，但横过切口的小血管还是应该电凝止血。
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英文: In some procedures, a tourniquet is a luxury, whereas in others, such as delicate operations on the hand, it is a necessity.
中文: 在一些手术当中，止血带是多余的，但在一些精细的手术如手外科手术，止血带则是必需具备的。
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英文: The tourniquet is a potentially dangerous instrument that must be used with proper knowledge and care.
中文: 因此，使用时必须具备相关的知识并且非常小心。
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