When the molecular weight and the chain of epoxy group of the base gum were about 5×10 5, 0.4%￣0.5%, respectively, fatty amino PEPA were used as crosslinking reagent under 130 ℃×4 h two stage cure, the tensile strength and hardness Shore A of vulcanizates are 2.0￣2.3 MPa, 46￣76, respectively.
Under the conditions that the grades of the crude ore are Fe 31.10%,Sn 0.6%,and when two stage grindings and two stage magnetic separations are used in the recovery of iron minerals,the result is obtained that the iron concentrate grade of Fe is 63.45%,with the recovery of 74.66%.
The Second Member of Neogene Ciying Formation ( N 2 c 2) is the main source rock, the Third Member of Neogene Ciying Formation (N 2 c 3) is the main reservoir rock, and the Forth Member of Neogene Ciying Formation (N 2 c 4) is the main cap rock.
The downhole accident rate is up to 40% during the drilling of the first batch of wells in WZ12-1N oilfield because of many faults and complicated geologic structure,especially the existence of hard and fragile mud shale in the second member of Weizhou Formation. Well B1 is a typical accidental well in which the collapses and sticking occurred due to hole instability.
Sedimentary facies analysis is dealt with in detail for the 1st-3rd sandstone beds in the second member of the Shahejie Formation on the basis of the relationship between the well logging facies and sedimentary facies.
The 1620t/d urea equipment is introduced from Holland by Luzhou Natural Gas Chemical Industrial Group joint stock Co LTD. The melting urea pump in it is used for pumping 99.7 percent urea solution which is condensed in the second section evaporator 402-C into sprinkler head 601-1 of pellet producing tower.
Moreover, the paper summarizes all kinds of seismic attributes' character and distributing rule in the reservoir layer of second section of Kongdian stratum in eastern area of Weibei, and putsforward 11 reservoir's seismic attribute parameters which can effectively and sensitively reflect reservoir's character.
For each test curve, the speeds of the two stage turbochargers were adjusted to the fixed data, and a compressor performance experiment was performed.
The system can get very high supercharging pressure when the speeds of the two stage turbochargers are rather low, which ensures the system's security and reliability.
Thermal analysis of the chloro complexes shows a three stage decomposition pattern for the Cu(II) complex and a two stage decomposition pattern for Fe(III) and Co(II) complexes to yield the respective metal oxides as the end product.
Based on the two stage magnetization process modeled by the authors, the size of the grain/lath and carbides in ferritic steels could be correlated with MBE parameters.
Turbo-pump with isolated two stage impellers for future rocket engine (Trial to drive impellers independently)
During the second stage, increasing the hot-pressing temperature or decreasing the original MC can shorten the time used to vaporize moisture.
The use of a formaldehyde-supplemented medium at the second stage of cultivation improved the rheological properties of ethapolan without reducing its yield.
In the second stage, the scenario is realized as a process-resource-object graph (prograph).
Changes in the extracellular glutathione level were biphasic: the glutathione level rapidly decreased during the first stage of the response and increased during the second stage.
Changes in the level of intracellular K+ were similarly biphasic: a rapid increase in the K+ level during the first stage of the response to hyperosmotic shock changed to a gradual decrease during the second stage.
The launching of such a ship into an Earth orbit or beyond by a large nuclear explosion in an underground cavity is sketched out in the second section of the paper, and finally we consider a hypothetical Mars mission based on these concepts.
The second section is devoted to self-similar nonsteady-state one-dimensional flows.
In the second section the variation with respect to q of the functional ∫0πw (x,t,x,;q)dx (t is fixed) is computed, where W(x, t, s; q) is the Riemann function of the problem
In the second section, where there is no discharge, the v-v exchange process results in a considerable increase in the density of vibrationally excited molecules in a certain upper part of the vibrational spectrum.
The first section was filled with air at a pressure of P1=0.8-1.5 torr, and the pressure in the second section was varied within the range P2=0.1-760 torr.