目的：评价国产防返流食管内支架在治疗各种原因引起的食管下端狭窄中的可行性。
Objective: To evaluate the feasibility and curative effect of domestic anti-reflux stent in treating various strictures of lower esophagus.
适用于苛刻的使用环境下的各种进口及国产高档四冲程摩托车。
Suitable for the use of harsh environment of various kinds of imported and domestic high-grade four stroke motorcycle.
本公司引进国内外先进电脑红外线切割机及电脑仿型机设备，可生产各种进口、国产天然大理石、花岗岩。
The company has introduced advanced computer infrared EDM and CNC copy machine equipment, produce a variety of imported and domestic natural marble and granite.
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