Crude oil prices halved over the 12 months but doubled after a trough in December. 原油价格在过去12个月内下跌了一半,但比去年12月的低点翻了一番。
The south Shulu etc, depression were developed on the basis of a deep narrow faulted trough with limited oil accum-ulation and all these accumulations are concentrated in the deep trough region. 南部的束鹿等凹陷是在深而窄的断槽上发育起来的,聚油有限,且都集中在深断槽区。
The Transformation Design of End Face Spiral Oil Trough Special Lathe 普通车床改为端面螺旋油槽专用车床的设计
Definition Concerning Oil and Gas Field of Contract Area of Xihu Trough, the East China Sea Retrospect and Prospect of the Cross-Border Cooperation Study 东海西湖合作区块油田和气田的定义及意义边境区合作理论的地理学研究
The accumulation models of these four types of depression are established according to this relationship: Oil and gas distributed around the trough like a ring in single fault with trough depression; 根据这种关系,建立了4种类型凹陷结构的成藏模式:单断断槽式以断槽为中心,油气近似环状分布;
The author suggests that forced convection and ultrasonic wave vibration should be employed simultaneously to exert a coaction on the oil trough. 提出了用被迫对流和超声波振动同时作用于淬火油槽的方法。
This paper presents a discussion on the formation, depositional filling and oil and gas distribution in the faulted trough within the eastern Liaohe basin. 辽河东部凹陷断槽构造发育、岩相充填及油气分布。
In accordance with the oil leakage problem in currently domestic diesel engines, a rubber sealing ring structure with a wide trough and a large cross-section is developed based on the calculating results. 根据计算结果并针对目前国内柴油机的泄漏情况,提出了采用大槽宽、大截面橡胶圈密封结构的观点。
This paper deals with the experimental study of improvement on the oil cooling ability by producing ultrasonic wave vibration in the quenching oil trough. 本文对在淬火油槽内用超声波振动提高油冷却能力的试验进行了研究。
It has been proved that with the vortex spray applied to the oil trough, the oil cooling ability will be improved remarkably. 试验研究表明,用涡流喷射器作用淬火油槽,可显著提高油的冷却能力。
Sixth, the plan still runs short of contract management, especially in the field of contract implementing. Definition Concerning Oil and Gas Field of Contract Area of Xihu Trough, the East China Sea 项目管理的合同制订缺乏完整性和可控性,特别在合同的执行过程中对合同的理解不够深刻。东海西湖合作区块油田和气田的定义及意义
After the global oil crisis in 1972, Toyota adopts the Just-in-time Production mode and rapidly walks out of trough. 1972年在全球石油危机风波之后,丰田汽车公司由于采用准时化生产方式,迅速走出低谷。