本发明构思新颖，结构简单，加工容易，适宜推广。
Said invention structure is simple, novel and is easy to manufacture and popularize.
本实用新型构思新颖，结构简单，准确度高，性能可靠。
The utility model has rational design, simple structure, high accuracy, and reliable performance.
本实用新型构思新颖，结构简单，准确度高，性能可靠。
The utility model has rational design, simple structure, high accuracy, and reliable performance.
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