1.
Research on Planting Method of Ridge Broadcast Sowing, Drilling of Youyan 7 Which is Effective;
油研七号起垅撒播、条播种植效果的研究
2.
Corporation on 7th Vaporization of Small Oil Furnace Installed on the Gun and Put Into Operation
热电厂七号炉汽化小油枪的安装与投运
3.
Research on SS7 Monitoring System based on PC
基于PC的七号信令监测系统的研究
4.
STUDY ON WELL OIL RESERVOIR FLOW UNIT OF BADAOWAN FORMATION AT SEVEN DIVISION OF KELAMAYI OIL FIELD
克拉玛依油田七区八道湾组油藏流动单元研究
5.
C. I'm sending Grandpa an e-card.
七、读一读，标序号。
6.
Research on the Remaining Oil Distribution Characteristics and Horizontal Well Development Technology of Thick Channel Sand Reserviors in the Western Block 7, Gudong Oilfield
孤东油田七区西厚油层剩余油分布及水平井开发技术研究
7.
Substitution, No. 5 for No.7.
换人，七号下，五号上。
8.
The date on this letter is 7 July 1975.
信上写的日期是一九七五年七月七号。
9.
Research of Authentication and Authorization Mechanism in NO.7 Signaling Network Management System;
七号信令网管理系统中的认证与授权机制研究
10.
Application and Research of Signal No.7 Analysis in the Telecom Increment Operation;
电信增值业务中七号信令分析的应用与研究
11.
NO.7 Signaling Central Monitoring System Technological Research in GSM System;
GSM系统中七号信令集中监测系统的技术研究
12.
Research on Construction and Application of the SS7 Surveillance System;
七号信令网监测系统的建设及应用研究
13.
Study on sedimentary facies for Qingshankou Formation in Qianqihao Area of Changling Sag in Songliao Basin
长岭凹陷前七号地区青山口组沉积相研究
14.
oil viscosity rating
机油粘度号数（机油号数）
15.
Practice and Study of Energy Efficiency in High-rise Residential Buildings of China National Petroleum Corporation Group 7;
中石油第七公司高层住宅建筑节能实践与研究
16.
The Study of the Antimicrobial Activities of Essential Oil in Flowers and Fruits of Libanotis buchtormensis(Fish) DC.;
长春七花和果实挥发油的抗菌活性研究
17.
A Study on Applications of Derivatives in 7 International Main Oil Companies;
七家国际大石油公司使用衍生金融工具的研究
18.
Studies on technology of supercritical-CO_2 fluid extraction for volatile oil and panax notoginseng saponins in radix notoginseng
超临界CO_2萃取三七中挥发油及皂苷的工艺研究