Excavators are also called diggers, scoopers, mechanical shovels, or 360-degree excavators (sometimes abbreviated simply to "360"). Tracked excavators are sometimes called "trackhoes" by analogy to the backhoe. In the UK, wheeled excavators are sometimes known as "rubber ducks". OverviewExcavators are primarily consisting of a , dipper (or stick), , and cab on a rotating platform known as the "house". The modern excavator's house sits atop an undercarria. .
Modern hydraulic excavators come in a wide variety of sizes. The smaller ones are called mini or . For example, smallest mini-excavator weighs 2,060 pounds (930 kg) and has 13. [pdf]
A drifter drill, sometimes called a rock drill, is a tool used in mining and civil engineering to drill into rock. Rock drills are used for making holes for placing dynamite or other explosives in rock blasting, and holes for plug and feather quarrying. While a rock drill may be as simple as a specialized form of chisel, it may also take the form of a powered machine. The mechanism may be worke. History and typesThe simplest form of rock drill consists of a long chisel or drill steel that was struck with a . , who worked unsuccessfully as a silver miner in the early 1860s before taking up journalism, described t. .
In reciprocating power drills, the drilling cylinder is mounted on a feed-screw, such that as the hole is drilled and the drilling point recedes from the rock face, the drill-bit continues to move into it, while the anchor point (on th. [pdf]
Yongcheng was born on 21 February 1739 as the Qianlong Emperor's fourth son. His mother, Imperial Noble Consort Shujia, was entitled "Concubine Jia" at that time. In 1763, Qianlong Emperor decided to adopt him into Prince Lü peerage as a grandson of Yuntao, Kangxi Emperor's 12th son because all the children of the prince Lüyi died prematurely. Yongcheng held the title Prince L. BornFeb 21, 1739DiedApr 5, 1777FamilyPrimary Consort • Imperial Princess Consort Luduan, of the clan ( ; 1751-1754) Titles: Primary Consort of the Fourth Prince (), Primary Consort of Prince Lu o. .
• Portrayed by Fang Yanfei in "" as Fourth Prince Yongcheng• Portrayed by An Jie in "" as Fourth Prince Yongcheng [pdf]
We’re taking a closer look at everything you need to know about being on a construction site, including health and safety concerns and some of the workers you might find on a job. .
Construction industry sites are potentially dangerous environments. To minimise risks, it’s important to be. .
Every construction project is different, and the workers and contractors required will change depending on the task in hand. Many construction projects will be made up of core specialists from the industry, however, including: .
Construction sites are exciting, vibrant places; however, when working onsite, it’s important to be aware of the work being carried out around you and to minimise any potential risks to yourself or to others where possible. If equipment appears to be out of. [pdf]
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