Helmholtz-Ketteler formula
亥姆霍兹-克特勒公式

• weighted mean
• weight function
• weighting factor
• weighting filter
• weighting function
• weight of measurement
• weights and measures
• weir ga[u]ge
• Weiss domain
• Weissenberg camera
• Weissenberg method
• Weissenberg photograph
• weld
• weldability
• welder
• welding goggles
• welding wire
• well
• well-collimated beam
• well-focused beam
• welt
• Wentzel-Waller theory of scattering
• Werner band
• Wernicke prism
• Weston speed