这种波导管的主要特点是结构简单。
This waveguide tube is chiefly characterized by its simplicity of structure.
由于其简单，安装风机盘管机组更经济比导管或中央供暖系统空气处理单元。
Due to their simplicity, fan coil units are more economical to install than ducted or central heating systems with air handling units.
结论PICC导管是一种简单、可行，并发症较少的方法，可广泛开展。
Conclusion PICC catheter is a simple, feasible method with few complications, and it could be widely used.
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