A bombard is a type of medieval cannon or mortar, used chiefly in sieges for throwing heavy stone balls. This weapon was usually used during sieges to hurl various forms of missile into enemy fortifications. Projectiles such as stone or metal balls, burning materials and weighted cloth soaked in quicklime or Greek fire are documented. Catapult

Jun 21, 2018· 7 Powerful road construction equipment and their uses. 4.) Crawler Excavator Also referred to as diggers, excavators are heavy construction equipment used for excavating earth and rocks and loading them onto a dump trucks. Excavators consists of a boom, bucket and cab on a rotating platform located above an undercarriage with wheels or tracks.

Jan 22, 2015· Tools Equipment (Also see: the "Quarry and Workship Equipment" "Tools Equipment Used in the Stone Shops Mills (saws, hand tools, etc.)" sections of our web site.) "Artistry of the Early American Stonemason," January 22, 2015, presented by Old Stone Houses. "Barre in The 'Nineties," (Barre, Vermont) by William Barclay, son of the first William Barclay, founder of the ...

Tips on Concrete for Stepping Stones. Your cement should be the consistency of thick brownie batter. You should be able to scoop it into your mold, not pour it. If you are using cement dye, keep in mind that the wet product will always be a shade or two darker that your finished product. If your cement mixture is too dry, the stepping stone can crack.

Jun 25, 2018· Stones. Stones were not only the building blocks being used to create pyramids, they served as important tools as well. The two main stone types used in construction were limestone and granite. Lowgrade limestone was used in creating the inner walls, while smoother white limestone was used on the outer walls.

Extracorporeal Shock Wave Lithotripsy (ESWL) is perhaps the most common treatment for kidney stones. It involves the administration of shock waves to the kidney stone. The shock waves are generated by a machine called a lithotriptor and travel from outside the body, through the skin and tissue until they reach the stone inside the kidney or ureter.

A special machine that can break kidney and ureteral stones from outside the body is used. Lithotripsy is recommended for stones <20 mm ( inches) in size. To break kidney and ureteral stones, focused shock waves (short pulses of high energy sound waves) are transmitted to the stone through the skin.

Because grinders use rotary action rather than impact to remove material, the depth of material removal is limited to about 1/8 inch, depending on the type of attachment used. They generally leave behind a smoother profile than scarifying or shotblasting, and when working on hard, dense concrete they may polish rather than abrade the surface.

Extracorporeal shock wave lithotripsy is a technique for treating stones in the kidney and ureter that does not require surgery. Instead, high energy shock waves are passed through the body and used to break stones into pieces as small as grains of sand. Because of their small size, these pieces can pass from the body along with the urine.

Nephrolithotomy: Your surgeon removes the stone through a tube. Nephrolithotripsy: Your surgeon uses sound waves or a laser to break up the stone and then vacuums up the pieces with a suction machine. The surgery takes 20 to 45 minutes. You'll typically have to stay in the hospital for a day or two afterward.

Crushing Equipment. Crushers are used to process large rocks into smaller stones. These powerful pieces of equipment use an elaborate system of jaws, vibrators and fixed steel plates to crush material transferred from the quarry in rock trucks into the finished product. These crushers can be adjusted to produce differing sizes of stone and gravel,...

The holmium laser melts up to of kidney stones and is useful on all kidney stone types and laser has an excellent safety record. Lithotripsy laser surgery is not without complications; the patient may experience bleeding for a few days after the procedure. Complication rates for any type of Intracorporeal surgery for ...

Nov 09, 2016· Pea gravel is a frequently overlooked mulch material. Its name comes from its size and shape, ranging in size from 1/8 inch to 3/8 inch. You can find pea gravel near bodies of water. The stones have a nice smooth surface created by natural weathering. Pea gravel comes in a range of natural colors like ecru, rust, gray, white, and translucent.

Breaking knives are a type of butcher knife that are used for cutting large sections of meat into smaller types of butcher knives feature curved blades, which gives the user additional leverage when cutting through tough skin, cartilage, and small bones. Additionally, breaking knives are ideal for trimming fat from cuts of meat.

Sep 21, 2017· Mattocks, variations of the pick axe, are used for breaking up heavy clumps of soil or tearing through roots. A pick mattock has a pointed end and a broad hoe blade used to break up large chunks of dirt and remove rocks. The axestyle blade on the head of a cutter mattock is ideal tool for chopping through rootladen soil near tree stumps. Forks

The types of Native American stone tools also help determine what activities the Indians commonly took part in. For example, they will be able to tell if the tribe concentrated on hunting, fighting, fishing, or farming, by the type of tools they used.

Jan 08, 2016· Depending upon the project requirement and soil to be compacted, different types of rollers are used for compaction work. The various types of rollers which are used for compaction are: Cylindrical Rollers; Sheepsfoot Rollers; Pneumatic tyred Rollers; Smooth wheeled Rollers; Vibratory Rollers; Grid Rollers; The following types of road rollers are generally used. 1. Cylindrical Roller. This is .

• Prescription diets and medications designed to dissolve stones. This is only useful for certain types of stones and typically takes 24 weeks. • Cystotomy – surgical incision in the bladder. This is used when stones cannot be dissolved, the pet also has a urinary obstruction, or the stone is .

Rammers are used for compacting small areas by providing impact load to the soil. This equipment is light and can be hand or machine operated. The base size of rammers can be 15cm x 15cm or 20cm x 20cm or more. For machine operated rammers, the usual weight varies from 30kg to .