【简介】近日，在内蒙古鄂尔多斯市准格尔旗东坪煤矿项目建设现场，国产大坡度极小半径煤矿巷道硬岩掘进机“东坪号”顺利始发 。“东坪号”开挖直径达7.64米，整机长度约127米，总重约1000吨，负责东 ...

Bigger isn't always better when it comes to a home security system. Sometimes small, discrete devices can deliver more peace of mind. Especially if perpetrators can never even tell they're being ...