نتایج جستجو برای: raw and mineral materials
تعداد نتایج: 16890923 فیلتر نتایج به سال:
Background. Russia occupies a leading position in the global extraction of minerals, meeting all demands Russian economy. The efficiency resources development determines both oil and gas industry, as well related economic sectors. At any stage, geological prospecting exploration works are carried out sequentially assume identification quantity, quality, shape size valuable component contained d...
after 15 years, now it is logical to ask whether eco can still play an effective role in iran’s development. by raising this question and reviewing the economic capacities of eco member states in the current decade under two categories of central asian countries and founding countries, this article shows the relative success of these economies through five elements of price of oil, gas, raw and...
this study investigated the effect of prior knowledge on the listening comprehension performance of fl learners. twenty students, male and female, drawn from the two intact groups of the senior and junior english language and literature majors were chosen as the participants of this study . the two groups were then randomly assigned into the experimental and control group. the experimental gr...
objective: the objective of this study was to investigate the invitro fluoride release of four new self-adhesive resin cements; set (sdi, australia), breeze (pentron, usa), embrace wetbond (pulpdent, usa), g-cem (gc, japan) and to assess the bonding performance of these self-adhesive resin cements for bonding of orthodontic brackets. materials and methods: for fluoride release experiment, six ...
چکیده ندارد.
EVALUATION OF THE ECONOMIC FEASIBILITY OF DEVELOPING MINERAL DEPOSITS AS A RAW MATERIALS POLICY TOOL
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