| 摘要 |
Means for freeing an opening in a base member from blocking fluids which may normally form a meniscus over an opening including a notch in the base member with a wide portion substantially tangent to the sides of said opening and with converging edges from said wide portion. The notch may include a V-shaped groove in the base member having a depth decreasing from said wide portion with converging edges of sharp definition. The notch may be aligned with the converging edges in the direction of forces tending to clear the fluid from the opening.
|
