Mobile crusher and screener machine is designed to crush large rocks into small rocks, gravel or dust. A crusher holds material which is to be crushed between two parallel solid surfaces. Sufficient force is applied to the material by crusher that generates enough energy to crush material by fracturing or deform the material. Screening is the process of taking granular ore material and separating it into multi-grades by size. Various types of screeners are used for the screening process. Both crusher and screens are used in the mining industry to crush the rock and then separate those using screeners.
"ReS2 (Rhenium Disulfide) is a transition metal dichalcogenide with a silvery black appearance. Electronically it is a semiconductor with an indirect band gap. Crystals appear flower-like, individual leaves are easy to cleave due to their layered crystal structure, held together by van der Waals force. Rhenium Disulfide is a new 2-Dimensional material and used as a semiconductor. The CAS number is 12038-63-0. The molecular weight is 250.33 and the density is 7.506.
"Refractories are heat-resistant materials that constitute the linings for high-temperature furnaces and reactors and other processing units. In addition to being resistant to thermal stress and other physical phenomena induced by heat, refractories must also withstand physical wear and corrosion by chemical agents. ASTM C71 defines refractories as """"non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)"""".
Refractories are produced from natural and synthetic materials, usually nonmetallic, or combinations of compounds and minerals such as alumina, fireclays, bauxite, chromite, dolomite, magnesite, silicon carbide, zirconia, and others."
The pipe wrench (US), Stillson wrench or Stillsons (UK) is an adjustable wrench used for turning soft iron pipes and fittings with a rounded surface. The design of the adjustable jaw allows it to lock in the frame, such that any forward pressure on the handle tends to pull the jaws tighter together. Teeth angled in the direction of turn dig into the soft pipe. They are not intended for use on hardened steel hex nuts or other fittings because they would ruin the head; however, if a hex nut is soft enough that it becomes rounded beyond use with standard wrenches, a pipe wrench is sometimes used to break the bolt or nut free. Pipe wrenches are usually sold in the following sizes (by length of handle): 10, 12, 14, 18, 24, 36, and 48 inches, although smaller and larger sizes are available as well. They are usually made of cast steel. Today, aluminum is also used to construct the body of the wrench, while the teeth and jaw remain steel. Teeth, and jaw kits (which also contain adjustment rings and springs) can be bought to repair broken wrenches, as this is cheaper than buying a new wrench. 
A paper towel is an absorbent towel made from tissue paper instead of cloth. Unlike cloth towels, paper towels are disposable and intended to be used only once. Paper towels soak up water because they are loosely woven which enables water to travel between them, even against gravity (capillary effect). Paper towels can be individually packed (as stacks of folded towels or held coiled) or come in rolls. Paper towels have similar purposes to conventional towels, such as drying hands, wiping windows, dusting, and cleaning up spills.