Secondly, based on the microbeam analytical technique, on the one hand, through investigating the characteristic of major elements in the mantle minerals the author acquired the static information from mantle ; on the other hand, through multi - point analysis of a part of the minerals from mantle, the auther got dynamic information from mantle. finally, generalizating the fruits of this study and predecessors, the autor holds that the constituents of lithospheric mantle possibly includes spinel lherzolites, clinopyroxenites, websterite, dunite, harzburgites, garnet lherzite, phlogopite lherzite, eclogites, clinopyroxene megacrysts ; compared with east china and north china platform, the research field mantle shows the characteristics of higher degree of partial melting processes and more depleted mantle ; the. upper mantle beneath north hetian area is heterogeneous, with a tendency of deficit in a12o3 and lree from kaliyang in west hetian to the river basin of kalakshi river and yulongkashi river ; the subduction of the crust beneath north hetian has ever occurred in geological history and caused the mixing of mantle - crust ; the depth of the origination of basaltic magmas beneath north hetian exceeds 73km ; the thickness of the lithosphere beneath the research area amounts to 204. 9km ; the mantle beneath north hetian has geological condtions for forming diamond deposits
最後,綜合本區幔源礦物和地幔巖石的特徵以及地球物理資料,得出如下結論:本區上地幔的物質組成有尖晶石二輝橄欖巖、二輝巖、單斜輝石巖、純橄欖巖、方輝橄欖巖、石榴石二輝橄欖巖、金雲母二輝橄欖巖、榴輝巖;與中國東部以及華北地臺上地幔相比,研究區上地幔具有富集主元素中相容元素和虧損其中的不相容元素的特徵,局部熔融程度較高;上地幔存在橫向和縱向的不均一性,從西部的克里陽到喀拉喀什河和玉龍喀什河流域, al和lree富集程度呈下降趨勢,不同來源的相同礦物中主元素的含量差異較大;地質歷史時期這里可能發生過地
殼俯沖並產生
殼幔混合作用;玄武巖漿的起源深度73km ;從幔源重
砂礦物的溫壓估算結果,可以推斷出巖石圈厚度可達204 . 9km ;綜合巖石圈物質組成特徵、巖石圈熱狀態、地幔溫壓狀態、氧逸度以及幔源巖石和幔源礦物的化學成分,認為研究區具備了金剛石成礦地幔地質條件。
It depends on such variables as the available supply of sand and shell material and the intensity of waves and longshore currents.
這完全取決于諸如
砂和
殼質的補給數量以及波浪和沿岸水流的強度這樣的一些因素。
Abstract : the present status of easy shakeout resin coated sand for aluminum alloy is described in detail, and the developing tendency is pointed out
文摘:詳細論述了鋁合金鑄件用易潰散
殼型
砂的發展現狀,並提出了今後的發展方向。
Hada mountain embankment dam is located at strong motion earthquake area with 7 degree. it is a sand - fill dam with clay core, stability of the dam under earthquake and the preventive of foundation liquescence is very important for the dam design
哈達山土壩是位於七度地震區,坐落在厚覆蓋層上的粘土心墻
砂殼壩,壩體的抗震穩定、基礎的抗震液化是本工程的技術關鍵問題。
Rapid prototyping technology changed the traditional pattern of product design, which could offer product sample for the designer, reduced design cycle and quicken the schedule of new product design, and it gave the decision - makers visual feeling. ; rp technology provided kinds of molds including resin - boncled mold laminate mold, investment mold and lost foam casting mold and so on for sand casting investment casting and cavityless casting, it could also use direct shell production casting to make pattern dies metal dies die - casting dies injection dies directly, and it could even produce casting products in small scales. the applications of fdm technology in plaster precision casting and the rapid casting technology based on sls technology were introduced, the organic combination between rapid prototyping tecnnology and foundry process, which initiated a new period of rapid manufacturing metal parts, by using advanced new technology alternated traditional foundry industry to make it looked brand - new, thus, the competition of foundry industry would be improved ; rapid prototyping technology offered a rapid economical feasible technical method, common processes of using rapid prototyping technology to produce dies were discussed, in the paper it explored that. the problem of combining rapid prototyping technology with electric arc metal - spraying technology to make metal dies and technics in dies manufacturing of combining rapid prototyping technology with precision casting, rapid tooling based on rapid prototyping, integrated advanced new technology and tradition technology of rapid prototyping manufacture, each superiority were exerted, rapid prototyping technology had been an efficiency measure to rapid update products and develop new product, and to middle -
快速成型技術改變了傳統的產品開發模式,可以為設計者提供產品樣件,縮短設計周期,加快新產品的開發進度,為決策者提供直觀性;快速成型技術迅速提供
砂型鑄造、熔模鑄造、實型鑄造用的各種模樣,包括樹脂模、層壓模、熔模和消失模等,還可採用直接制
殼鑄造法直接製造熔模鑄造用的壓型、金屬型、壓鑄型、注塑模,甚至直接製造小批量鑄件,介紹了熔積成型技術在石膏型精密鑄造上的應用和基於選擇性激光燒結技術的快速鑄造技術,快速成型技術與鑄造工藝的有機結合,開創了快速製造金屬零件的新階段,對用高新技術改造傳統的鑄造工業,使其面貌煥然一新,增強鑄造行業的競爭能力;快速成型技術為母模的製造提供了一條快速、經濟、可行的技術途徑,討論了利用快速成型技術製造模具的一般工藝方法,探討了將快速成型技術與金屬電弧噴鍍技術結合起來快速製造金屬模具問題,以及快速成型技術與精密鑄造技術相結合的模具製造工藝,基於快速成型製造的快速模具技術,集成了快速成型製造高新技術和傳統技術,發揮各自優勢,已成為產品快速更新換代和新產品開發及中、小批量生產的有效手段之一。
Water purification lu : liao products mainly walnut shell lu : liao, fibres ball lu : liao, activated charcoal, anthracite lu : liao, quartz sand lu : liao, stone lu : liao, pp filters, rags, soft materials
凈水濾料產品主要有核桃
殼濾料、纖維球濾料、活性炭、無煙煤濾料、石英
砂濾料、麥飯石濾料、 pp濾芯、凈水劑、軟性填料等。
Sha ke is the shell of sha ren
砂殼是
砂仁的外
殼。
Fks - 1 type film laminating sand crust capacity tester
Fks - 1型覆膜
砂結
殼性能測試儀
Fks - 1 crusting capacity tester of film laminating sand
Fks - 1型覆膜
砂結
殼性能測試儀
Crust performance tester of precoated sand
6覆膜
砂結
殼性能測試儀
Use : testing shell speed and crusting condition of film laminating material
1儀器用途:檢測覆膜
砂材料結
殼速度和起皮狀況
In order to producte qualified inlet manifold casting, top gating system with lip riser and shell core made of precoated sand is used
為了獲得合格的進氣歧管鑄件,採用壓邊頂鑄澆注系統和覆膜
砂殼芯製作工藝。
Thirty - five genuses of periphytic algae were observed, which seneara, stauroneis and mougeotia were dominant populations. sixty species of protozoan were observed, which amoeba proteus, actinophrys so, litonotus fasciola were dominant populations. 2
優勢種群為針桿藻屬、輻節藻屬、轉板藻屬;周叢原生動物60種,優勢種群為大變形蟲、放射太陽蟲、
砂殼蟲、片狀漫遊蟲。
It is more suitable for weak stomach with over active liver
砂殼氣味薄、燥性小,肝旺胃弱者用之較為適宜。
Analyses of the monitored seepage data of the sand case dam with clay core of jilihe reservoir show that the impervious effect of the clay core is good, that the blanket in the front of the dam has little impervious effect, and that seepage failure will probably take place because of the weak cutoff groove and the large seepage gradient
摘要對吉利河水庫粘土心?砂殼壩的滲流觀測資料分析表明,該壩粘土心?的防滲效果較好,但壩前鋪蓋沒起到防滲作用,且截滲槽較薄弱,滲透比降較大,可能發生滲透破壞。