Combined with productive practice,each core sand can be arranged in order on the basis of technical properties.

以改性淀粉為主粘結(jié)劑配制芯砂并進(jìn)行芯砂工藝性能試驗，采用灰色關(guān)聯(lián)的數(shù)學(xué)分析方法91无码视，對改性淀粉芯砂的工藝性能進(jìn)行分析色综合www在线视频。

The temperature fields of sand core for castings with thickness in 60, 30, 18 and 8 mm were simulated. The results show that the modified water glass sand has good knockout capability, and pouring experiment results also verify the simulated results.

用上述計算程序模擬計算了壁厚分別為60、30最新在线精品国自产拍三级片、18国产一级A特黄AAA片、8mm的鑄件砂芯溫度場分布，模擬結(jié)果表明改性水玻璃砂有好的出砂性久久国产精品一区，澆注實驗證實了計算機模擬分析結(jié)果一级做a爰黑人又硬又粗视频。

Now has advanced technology, excellent equipment, numerical control production line of the crankshaft 12; have the domestic advanced level modeling clay sand, resin sand molding and iron coated sand mold casting production lines, electric furnace, cupola furnace smelting double performance of a wide range of ductile iron 10,000 tons of castings foundry base base and heat treatment.

目前擁有技術(shù)先進(jìn)、裝備優(yōu)良中文字幕在线看一区二区、數(shù)控化曲軸生產(chǎn)流水線12條欧美性交小说网；具有國內(nèi)先進(jìn)水平粘土砂造型、樹脂砂造型及鐵模覆砂鑄造生產(chǎn)線求黄色免费网站，電爐黄.片、沖天爐雙爐熔煉的多種高性能球墨鑄鐵的萬噸鑄件鑄造基地和熱處理基地。

A series of small-scale model tests were carried out to measure stresses developed in testing quartz sand bed during loading and the corresponding variation during unloading in glass cylinder and steel rectangular box. A new conceptual stress release model was proposed based on the model test results by considering the fundamental behavior of granular materials.

采用室內(nèi)靜力模型試驗研究了某種石英砂的加卸載和應(yīng)力釋放特性狂野欧美性激色啪XXXX网站，對比了在砝碼加卸載條件下圓筒玻璃容器和矩形鐵箱容器中砂中不同位置處的應(yīng)力變化aaaaaa日本，明確了砂的加卸載應(yīng)力變化規(guī)律，并在此基礎(chǔ)上提出了針對砂土的摩擦型散粒體材料的應(yīng)力釋放模型色哟哟伊人。

This paper analysis the form condition of running sand, combine with the mechanics pump drainage, based on the seep theory and function with sand, analysis the accelerate effect on being running sand, propose some advices to prevent it finally.

通過分析流砂的形成條件免费视频黄片福利大全。，結(jié)合泵排水法的作用機理，基于地下水滲流理論和砂體的作用啪啪啪免费试看，分析了其對流砂形成的加速效應(yīng)美女a黄色视频，提出了針對泵排法的特有的防治原則和措施。

The foundation of Dalong Water Control Project is constructed with the method of filling sand between upstream and downstream berms; of which the filled sand mainly consists of the medium-coarse sand with high content and large size gravel.

大隆水利樞紐工程壩基是在上下游戧堤間填砂而成的久久国产乱子伦精品，填砂的主要成分為含卵礫中粗砂超碰中文字幕，其特點是卵礫石粒徑大、含量高强奸电影网站。

PartⅡEffects of different surface treatments on microstructure of porcelain fused to electroformed copings and metal-ceramic interface Materials and Methods: Five electroformed copings were made in the size of 5 mm×5 mm, different surface treatments were taken respectively, including no treatment, 50μm Al_2O_3 sand blasting, 110μm Al_2O_3 sand blasting, preoxidation after 110μm Al_2O_3 sand blasting, gold bonder applying after 50μm Al_2O_3 sand blasting. Another two metal-ceramic specimens by electroforming were made in the size of 20 mm×5 mm.

第二部分不同表面處理對金沉積基底及金瓷界面顯微結(jié)構(gòu)的影響材料和方法：制作5mm×5mm大小的金沉積片5個欧美一区二区另类A片，分別經(jīng)以下處理：表面未處理，表面50μm国产主播秋霞、110μm Al_2O_3噴砂一级黄片在线精彩视频免费播放，110μm Al_2O_3噴砂+預(yù)氧化，110μm Al_2O_3噴砂+金黏結(jié)劑午夜性生活免费视频；另外制作金沉積烤瓷試件2個国产嫖妓凹凸视频，掃描電鏡下觀察金沉積基底層和金瓷界面形貌，能譜儀進(jìn)行元素掃描分析人人看人人摸人人操人人色。

Different surface treatments were taken on round gold surface, including no treatment, 50μm Al_2O_3 sand blasting, 110μm Al_2O_3 sand blasting, gold bonder applying after 50μm Al_2O_3 sand blasting, gold bonder applying after 110μm Al_2O_3 sand blasting, and the same nine Ni-Cr alloys were cast as contrast, the gold copings and Ni-Cr alloys were both received two layers of opaque and two layers of body porcelain. Shear tests were performed in a universal testing machine. After loading the sections were examined by SEM and EDS analysis.

第一部分金沉積基底不同表面處理對金瓷剪切強度的影響材料與方法：制作直徑4.0 mm有色有爽，高度為8.0 mm的圓柱形Ni-Cr合金試件45個，表面電鍍形成金沉積帽狀基底，隨機平均分成5組亚洲女优操逼色视频，分別為表面未處理組99精品众筹模特在线视频、50μm、110μm Al_2O_3噴砂組欧美很鲁视频在线观看、50μm Al_2O_3噴砂+金黏結(jié)劑組天天草夜夜、110μm Al_2O_3噴砂+金黏結(jié)劑組；另鑄造同樣規(guī)格的Ni-Cr合金試件9個亚洲高清偷拍一区二区，作為對照www.99re.8com。

In contrast to JMSA bonded sand of Kinki University,α-starch compound binders bonded sand is near in the green and retention strengths, but exceptionally higher in the baked strengths, high temperature strengths which can match furane resin bonded sand and better in humidity resistance.

與近畿大學(xué)的JMSA粘結(jié)劑砂比較，該復(fù)合粘結(jié)劑砂除具有與之相近的濕強度和放置強度外影音先锋中文无码资源区，還具有可與呋喃樹脂自硬砂相媲美的較高的干強度欧美另类中文清纯一区、高溫強度及較好的耐濕性。

When towed fish is towed in the direction perpendicular with the lineation of hinge line of sand waves, the wave length and dipping angles, can be determined from the sonar image at nadir. Under the circumstance, whether the shape of the sand wave is symmetric or not can be shown and the main direction of sediment transportation can be pointed out.

依據(jù)相對大尺度的砂波污网站免费入口网站站免费，在拖魚指向與砂波脊線成大角度斜交時操B網站，該波形可在拖魚正下方影像顯示，并且可以辨識該波長與坡傾角农村欧美丰满熟妇XXXX，以判定此砂波為對稱波形亚洲三级电影2021，或非對稱波形，來指示沉積物的凈搬運方向人人干人人射人人插人人操。