…The drilling speed varies greatly depending on the strength of the rock, but for granite, it can be up to several tens of centimeters per minute. A large horizontal drill is called a drifter, a small handheld downward drill is called a plugger or jack hammer, a small one with an air leg is called a leg hammer, and an upward drill with a support leg integrated with the rock drill is called a stopper. In recent years, pluggers and stoppers are rarely used. … *Some of the terminology that mentions "leg hammer" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…さく孔速度は岩石の強度で大きく異なるが,花コウ岩などでは毎分数十cmまでである。大型の水平さく孔用をドリフターdrifter,小型で手持ちの下向きさく孔用をプラッガーpluggerまたはジャックハンマーjack hammer,小型でエアレッグを備えているものをレッグハンマーleg hammer,支持脚が削岩機と一体となっている上向きさく孔用をストーパーstoperと呼ぶ。近年はプラッガーとストーパーはまれにしか使用されない。… ※「leg hammer」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
…During this time, MacArthur persistently request...
A mountainous region in southeastern Australia. It...
It is the capital of the Seine-et-Marne department...
The sect was one of the three major Jewish sects a...
A town in the center of the Tsugaru Plain facing t...
…a cultural movement widespread among the peoples...
A city facing Lake Nakaumi in the west of Tottori ...
…Yeongdeungpo-gu in the Gangnam area is part of t...
...The third Shogun, Iemitsu, liked young men, so...
This refers to rights and interests that business...
"Income gain" refers to the income obtai...
The added value created by one unit of production ...
…It is commonly found from Kinki to Shikoku. Okin...
1572-1662 Oda-Toyotomi - An ancient calligraphy a...
...Therefore, conditioning can occur even if the ...