Liangjia Coal Mine in Longkou mining area is a typical "three-soft" mining area, meeting many difficulties in roadway support.

龙口矿区梁家煤矿是典型的“三软”矿区，在巷道支护上遇到了非常大的困难。

youdao

The II3123 face is a light type caving face of three-soft coal seam. the roof is cracked, sloughing and roof fall often occur.

前言： 石台煤矿II3123工作面为“三软”煤层轻放工作面，顶板破碎易掉，片帮、冒顶时常发生。

youdao

Based on the analysis of gas source at the working face with "three-soft" unsteady coal seam, the authors introduce the principle and method of gas suction by roof-rock drilling.

前言： 通过对“三软”不稳定煤层采煤工作面瓦斯来源的分析，介绍了采用顶板岩石钻孔抽放解决瓦斯问题的原理和方法。

youdao

In the U.S., she's released three soft-spoken yet confident and moving albums, including her latest, Me and Armini.

NPR: Emiliana Torrini: From Iceland, Stripped Down

The dog trainers were lovely, three soft-spoken girls who loved the dogs and the racket and the smell.

NEWYORKER: The Dog

Among them three beverage-companies, soft drink-maker Coca-Cola and brewers Anheuser-Busch InBev, SABMiller, and Heineken.

FORBES: Playing The World Cup With Stocks