chemical front 中文意思是什麼
chemical front
解釋
化學前鋒-
The variations in trace element contents and ratios may hold up a mirror to the lake - level fluctuations and climatic changes, which, in turn, have exerted a direct and important effect on the sequence stratigraphic development. collectively, the reservoir rocks from the yanchang formation consist dominantly of the delta front subfacies subaqueous distributary channel and channel - mouth bar microfacies and delta plain subfacies subaerial distributary channel microfacies fine - grained feldspar sandstones and siltstones. the reservoir rocks have been subjected to three stages of diagenetic and porosity evolution : ( 1 ) the porosity reduction by the mechanical compaction and chemical pressure solution during the early diagenetic stage ; ( 2 ) the porosity increase by the dissolution during the a substage of the late diagenetic stage, and ( 3 ) the porosity reduction by the cementation and filling during the b substage of the late diagenetic stage
系統的儲層特徵研究表明，該區延長組儲層成因類型主要為三角洲前緣水下分流河道、河口砂壩及三角洲平原水上分流河道微相細粒長石砂巖、粉砂巖；儲層巖石經歷了壓實，膠結，溶蝕等成巖作用，歷經早成巖機械壓實和化學壓溶孔隙縮小期、晚成巖a亞期溶蝕作用孔隙擴大期及晚成巖a亞期（ b亞期）膠結充填孔隙縮小期三個成巖-孔隙演化階段；儲層物性總體上具有較低孔滲、低孔滲的特點，孔隙類型主要為粒間溶孔、殘余粒間孔隙、粒內溶孔、晶間孔及晶間溶孔，裂縫不發育，儲集巖排驅壓力和中值壓力較高，孔隙結構類型以細小孔-微孔隙，微細喉-微喉型為主。 -
Technologies such as chemical constitution selecting, alloy melting, casting process designing and optimizing, mechanical machining and heat treatment process on pump body, impeller, front and rear board of cw. nb450 dredge pump abrasion resistance parts are concluded
摘要總結了用於挖泥船的cw . nb450型泥泵過流耐磨部件泵殼、葉輪、前後襯板的化學成分選擇、合金熔煉、鑄造工藝設計及優化、機械加工、熱處理工藝等技術。 -
The model is solved with the finite difference method, the simulation software is organized to simulate the transient thermal response of the front region of projectile wing such as those launched by electrothermal chemical guns
採用有限差分法進行數值求解，並編制了較為通用的模擬軟體，用於模擬諸如由電熱化學炮發射的高超聲速穿甲彈彈翼前緣的瞬時熱效應。 -
In the front part of this paper we discussed the chemical reaction quantitive calculation ' s determinate algorithm and stochastic algorithm
本文的前面詳細的討論了虛擬細胞中化學反應定量計算的確定型演算法和隨機型演算法。 -
A chemical manufacturer that opened its corporate knowledge base to the front - line sales force improved its level of customer service, resulting in shortened sales cycles
一家化學品製造公司對一線的銷售隊伍開放了公司知識庫，提高了他們的客戶服務水平，從而縮短了銷售周期。
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