CS/SW2B Type 30mm General Turret Comprehensive Gun Sight (hereinafter referred to as sighting telescope) is installed in PT99 type 30 turret.

SW2B型30毫米通用炮塔综合炮瞄镜（以下简称：瞄准镜）装载于PT99式30炮塔。

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The sight telescope was mounted in such a way that the line of sight could be offset from the axis of the bore of the gun to correct for range, drift, and relative motion of gun and target.

这种瞄准镜底座是可以转动的，使得瞄准线能够偏离炮膛轴线以修正射程，偏流及火炮与目标之间的相对运动。

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