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.
功能指示螺纹规是为了检验通端的最大材料限度及大小及止端的有效直径限度及大小。
Functional Indicating Thread Gage for inspecting the maximum-material GO functional limit and size and the NOT GO functional diameter limit and size.
旋开移相器上“西科”牌（？）装置一端的止动柄，即可转动止动柄而调整移相器。
Unscrew the locking handle found on the side of the phase shift 'Siko'unit; this enables the adjusting handle to be turned.
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