under tail-covers

The modified Claus process and the relevant tail gas treatment processes are under continuous optimization to reach higher sulphur recovery rates.

改良Claus工艺和相应的尾气处理工艺在不断地优化，以达到更高的硫回收率。

The relationship between the existence of the moment of random variable and the convergence of tail probability series of random variable sequences is investigated, under certain mixing rates, more generally complete convergence of ρ-mixing sequences are obtained.

本文通过讨论随机变量矩的存在性和随机变量序列尾概率级数收敛性之间的关系，在一定的混合速度下，给出了ρ-混合序列部分和更为一般的完全收敛性。

The device used in the snubbing block the tail pipe in order to achieve the role of the tubing from under the column.

采用此装置在不压井作业中封堵尾管以实现油管立柱起下的作用。

Cementing Tail Pipe under Complicated Conditions of 6026 m.in Well Long& 4

龙4井6026m复杂情况下的尾管固井

For Francis turbine at home and abroad in the condition that under partial load tail pipe pressure pulsation research has become more and more widely.

国内外对混流式水轮机在部分负荷下尾水管压力脉动的研究已越来越深入。