By this method, the gaseous particle thickness between the two apertures is minimised and the required pumping speed of the first evacuation stage is also reduced to an absolute minimum.
According to the literature, the whole process of evacuation includes several stages, such as pre-movement, action period, walking period, etc.
According to the Mianyang government information office, the authorities have started implementing a two-stage evacuation plan.
It can be seen that the simulation result distribution varies by stages with evacuation population changes.
The tows allow air evacuation in the initial stages of processing and are subsequently infiltrated by surrounding matrix.
Evacuations take place in stages, with pregnant women, children, elderly people and valued livestock removed to designated centres first.
In the last days, as the embassy hastily prepared for the last stage of evacuation, 22 Gia Long was chosen as one of about a dozen possible gathering places for Americans.
Since each evacuee starts from various points in the area, concentration of evacuees on specific roads is unlikely to occur at the early stage of evacuation.
Officals at Los Alamos, which was closed as a precaution on Monday, announced that the lab would remain closed on Tuesday due to "risks presented by the Las Conchas wildfire and the staged, mandatory evacuation of the Los Alamos town site".
By this stage in the war, the German submarine authorities had become aware of the existence of Q-ships and Captain Ernst Rosenow of the UC-29 was taking no risks with his target, remaining at 400 yards (366m) distance watching the staged panicked evacuation of the ship.
