The message classes are used to retrieve messages generated by a previous operation such as a command call.
消息类用于检索前一个操作(比如一个命令调用)生成的消息。
Methods To analyse the clinical materials of the 31 cases of patients with previous operation failure of lumbar disc herniation.
方法回顾分析我们收治的31例腰椎间盘突出症手术失败患者的临床资料。
The understanding of the previous operation history in detail and correctly choosing of the first insertion position are the key for successful laparoscopic insertion.
详细了解既往手术史，正确选择第一穿刺部位，注意操作，是腹腔镜手术穿刺成功的关键。
The utility model improves on the basis of the previous design of single-cylinder compressor and still preserves the previous operation principle and property and the compact structure.
本实用新型在原设计的单缸压缩机基础上改进的，它仍保持原有的工作原理及特性，结构紧凑。
The utility model improves on the basis of the previous design of single-cylinder compressor and still preserves the previous operation principle and property and the compact structure.
本实用新型在原设计的单缸压缩机基础上改进的，它仍保持原有的工作原理及特性，结构紧凑。
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