Make at the same time we to double in double out ball type coal pulverizer work principle , operation process, movement characteristic had further cognition with increase.
同时使我们对双进双出球磨煤机工作原理、作过程、行特性有了进一步了认识和提高。
RESULTS: Bilateral retrograde placement of double pigtail stent was performed in 2 cases. Indwelling different size double pigtail stents in unilateral ureters were carried out in 17 cases.
结果：2例经输尿管镜逆行放置两侧输尿管双猪尾导管内引流，17例经皮肾穿刺造瘘和扩张后于单侧输尿管放置两根不同直径的双猪尾导管内引流。
RESULTS: Bilateral retrograde placement of double pigtail stent was performed in 2 cases. Indwelling different size double pigtail stents in unilateral ureters were carried out in 17 cases.
结果：2例经输尿管镜逆行放置两侧输尿管双猪尾导管内引流，17例经皮肾穿刺造瘘和扩张后于单侧输尿管放置两根不同直径的双猪尾导管内引流。
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