Below each retort, and attached to it, is a cooler formed of thin sheet-iron, which receives the hot char as it passes from the retort, and at the bottom of the cooler is an arrangement of valves which permits a certain amount of char to drop out and no more.
drop out הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד