In tidal ports, depths are almost always calculated with the lowest low line as zero line.

在潮汐式港口, 将最低水位计作零水位.

Strictly prohibited ground connected to the zero line or water pipe .

严禁将地线接在零线或自来水管上。

This Zero Line is a perfect line that should be maintained throughout the maneuver regardless of the Angle of Attack.

我门必须在这个特技动作中始终维持这条零线而不需要顾及飞机的攻角。

The existing three-lane system is the smart remote control switches wiring, switches and the need to live, zero line, light line can work.

现有的智能遥控开关是三线制接线方式，开关需要同时接火线，零线，灯线才能工作。