vent-hole

基本解释

This preparation includes: 1) Vent hole in ball 2) Flow directional arrow 3) Cleaned and bagged to prevent contamination.
包括：1)球内通气孔；2)流向箭头；3)经过清洗并采用能够防止污染的包装。
Taking the self-design simplified arc chamber model as the research target, the displacement and moving speed of arc under different external magnetic field and vent hole is analyzed.
以自制简化灭弧装置为研究对象，分析了不同外加磁场和不同出气孔时电弧的运动情况。
Placement of vent holes are 1” in from the side and 1” up from the bottom of the bag.
排气孔的位置分别是横面1英寸，从袋子顶端到袋子底端也是1英寸。
The jet flows from vent holes in a center-core igniter strongly influence the process of ignition in guns.
中心点火管传火孔射流场直接影响火炮膛内的点火传火过程。
His strength in a crisis is an ace in the hole.
临危不惧是他的看家本领。