1) "four improvements
“四化”模式
2) four
四
3) tetra-
四
4) four uplifts and four depressions
四隆四拗
1.
In early Ordovician,the structural framework was formed with four uplifts and four depressions,which were developed as NE-trending deep fault belts and NW-trending splitting belts and controlled the stratigraphy,magmat ism and distribution of minerals in the area.
区内于早奥陶世初形成的“四隆四拗”构造格局控制了以后各地质时期地层、岩浆演化及矿产的分布。
5) four-time mixing and spraying
四搅四喷
1.
A new method is put forward, which requires four-time mixing and spraying and diluted grout.
结合工程实例 ,简要介绍深层搅拌桩法的主要技术参数、施工工艺、质量控制与检验 ,提出了四搅四喷和稍稀水泥浆液成桩方法 ,对探索不同地区、不同土质条件下搅拌桩施工提供了经验参数 ,可资借
6) "4 to and 4 not to"
四宁四毋”
1.
On Fu Shan s "4 to and 4 not to" Principle;
也谈傅山的“四宁四毋”
参考词条
补充资料：四化
“四个现代化”的简称。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。