单词:heavy hand-held rock drill
单词:heavy hand-held rock drill 相关文章
Rock climbing is the original extreme sport. Basically , rock climbing is going from the bottom of a wall to the top and then back down again. The main goal is to have fun while doing so and to pref
Kenya Moves Full-Steam Ahead on Geothermal Production Kenya is expanding plans to become one of the worlds top geothermal power producers with the start of explorations at a site called Menengai. The government is also aiming to make geothermal Kenya
This is SCIENCE FRIDAY. I'm Ira Flatow. Last August, NASA's Curiosity Rover staked its claim in Gale Crater on the surface of Mars, and since then it's been cruising around, zapping rocks, sniffing the Martian air and snapping some self-portraits. Bu
At Yeshivat Netivot school in Jerusalem, students were evacuated to a safe place and police, ambulances and fire trucks arrived soon after the alarm sounded. Chen Livni, Commander of Jerusalem District in the Home Front Command, says the exercise hel