Its character is that through the adjustable valve controlled by inspiration and expiration, it offers and halts oxygen supply. The utilization rate of oxygen is over 98 %. 其主要特点是通过调控装置可使吸气时供氧,呼气时暂停供氧,故使氧的利用率高达98%以上。
The development of continental sequences and sedimentary environment changes are controlled or influenced by the tectonic subsidence and space of accommodation, sedimentary supply and accumulation rate, water supply and climate and sedimentation process. 在陆相地层发育过程中,层序发育与沉积环境转化是受盆地的构造沉降与可容空间、沉积物供给与沉积物堆积速率、盆地供水量与气候以及沉积作用过程的影响和控制。
It is shown by analysing the grain size of the rocks that the well sorting of elastic grain, depending on the sedimentary environment, is evidently controlled by the eustasy, the growth rate of accommodation space as well as the supply rate of deposits. 粒度分析表明,碎屑颗粒的分选性除了与沉积环境有关外,还明显受海平面升降、容纳空间的增长速率以及沉积物供给速率控制。