| 单词 | lead angle |
| 释义 | lead angle [`lēd ´aŋ·gǝl] DESIGN ENGINEERING The angle that the tangent to a helix makes with the plane normal to the axis of the helix. METALLURGY The angle at the point of welding between an electrode and a line perpendicular to the weld axis. ORDNANCE 1. The angle between the line of sight to a moving target and the line of sight to a point ahead of the target. 2. A dropping angle. PHYSICS The phase difference between a sinusoidally varying quantity and a reference quantity which varies sinusoidally at the same frequency, when this phase difference is positive. Also known as angle of lead; lead; phase lead. |
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