目的 了解上斜肌止端前缘的解剖部位。
Objective To observe superior oblique muscle at the scleral insertion.
在逆止器的轴端孔内通过胀套和双平键与从 动轴连接；
The inner part of a shaft end hole of the backstop is connected with a driven shaft through an expansion bush and a double flat key;
内筒的一端端口法兰内径处设有止口，用于与相邻筒节的对应端无止口法兰插接。
The inner diameter part of the flange at one port of one end of the inner cylinder is provided with a rabbet for splicing with a flange without a rabbet at a corresponding end of an adjacent elbow.
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