The paper expounds the structure, basic principle hydraulic system and the theoretical analysis, with which the main technical parameters are determined, etc. of the fast throwing device of oil tank container first developed in China.
Also it incisively analyzes what should be the first developed and the fields to be developed priory during the promotion and enforcement of housing industry modernization technologicaldevelopment. The article describes the sustainable development principles and analyzes the technological innovation mechanism of housing industry modernization technology.
Via analysis of characteristics of the maximum effective pressure reductions in the train pipe while the stepless empty and load brake equipment being in different positions,and the reasonable selection of the maximum pressure in brake cylinder while the car being empty,the suggestion is given that the stepless empty and load brake equipment should be first developed.
Recombinant DNA technique is the core of modern biotechnology It is a kind of high technique complex continually developing system,which is also one kind of high technique first developed in the world.
Ecological agriculture and leisure ecological tourism should be first developed at present,in order to bring along other ecological industries and establish a firm foundation for boosting up the economic strength in Qiannan.
This system is a totally automatic measuring and analyzing system with wide measuring range (from 10-16 to 10-2A) and high precision (0.2%) which is first developed in china.
Strip with stationary phase N263 was first developed with a mobile phase 4N HC1 to separate cobalt, copper, nikel and rhodium, then a second mobile phase of 4N HNO3 -2N HCl was used to separate gold and five remained platinum metas.
Photonic crystal fibers were first developed in 1996 and have subsequently been the focus of increasing scientific and technological interest in the field of fiber optics.
A platinum-free alkaline ethanol-air fuel cell is first developed.
The results are compared with a simple approximate theory first developed by Timofeev and further improved and generalized by Tennyson and coworkers.
Conduct disorder was diagnosed retrospectively using the Diagnostic Interview Schedule first developed for the Epidemiological Catchment Area study.
Mechanical circulatory support devices were first developed to permanently replace the failing heart.
Furfuryl alcohol resin produced by our nation-wide people's communes is recognized as one of the cheapest heat-resisting and non-corrosive polymers available at present. The use of the resin for sand-bonding and glueing foundry shells together was first developed in China. Both liquid and powdered resins were tested in this experiment. Their bonding efficiency is evaluated by means of strength tests on 8-shaped standard specimens. The resin as an adhesive is applied to the shell joint in paste form and...
Furfuryl alcohol resin produced by our nation-wide people's communes is recognized as one of the cheapest heat-resisting and non-corrosive polymers available at present. The use of the resin for sand-bonding and glueing foundry shells together was first developed in China. Both liquid and powdered resins were tested in this experiment. Their bonding efficiency is evaluated by means of strength tests on 8-shaped standard specimens. The resin as an adhesive is applied to the shell joint in paste form and made to set by the application of residual heat of shells. Tests have shown that furfuryl alcohol seems more inportant than its resin in the sand-mixture for mould-blow- iny, as the former has the better flowability tested on the apparatus specially designed.
Besides the commonly used Co-Mo-Al_2O_3 catalyst,the industrial Fe-Mo-Al_2O_3 hydrodesulfurization catalyst first developed in our country has been used in some of our chemical industrial processes.The present paper reports the phase composition,structure and valence state of Fe-Mo-Al_2O_3 catalyst obtained by the conventional magnetic balance andX-ray diffraction methods.It has been shown that(1)about 91% of the total iron in the catalyst as Fe~(3+),and about 9% as Fe~(2+) with molybdenum in the Mo~6+state;(2)the...
Besides the commonly used Co-Mo-Al_2O_3 catalyst,the industrial Fe-Mo-Al_2O_3 hydrodesulfurization catalyst first developed in our country has been used in some of our chemical industrial processes.The present paper reports the phase composition,structure and valence state of Fe-Mo-Al_2O_3 catalyst obtained by the conventional magnetic balance andX-ray diffraction methods.It has been shown that(1)about 91% of the total iron in the catalyst as Fe~(3+),and about 9% as Fe~(2+) with molybdenum in the Mo~6+state;(2)the crystal phase of β-FeMoO_4 appears in the catalyst;(3)the iron ions are paramagnetic with an observed average effective magnetic moment of 4.8 B.M.,apart from a trace of a ferromagnetic component;(4)the support γ-Al_2O_3 shows no effect on either the Weiss constants or the effective magnetic moments of the principal components in the catalyst.The possible structural characteristics referring to the catalytic activity has been discussed.
In order to keep efficient operation of a Kaplan turbine, it is necessary to adjust both the guide vane opening and the blade angle under different height of heads by the governor. At present, instead of cam mechanism, electrical coordination devices are adopted in simultaneous adjustment of guide vanes and blades.In this paper, an electrical coordination device, first developed in China, is introduced.Two types of bivariant function generators are explained in detail
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