In 1877, he created a machine with two needles: one for recording and one for playback.
1877年时，他创造了一个内附两只唱针的机器：一只用来记录，而另一只用来播放。
Conclusions Percutaneous intracystic steroid injection using two needles for solitary bone cysts in children is simple, safe and effective.
结论经皮双针囊腔内注射类固醇适合于小儿孤立性骨囊肿，简单，安全，治愈率高。
Conclusions Percutaneous intracystic steroid injection using two needles for solitary bone cysts in children is simple, safe and effective.
结论经皮双针囊腔内注射类固醇适合于小儿孤立性骨囊肿，简单，安全，治愈率高。
应用推荐