In the industrial and industry context, a refractometer is a precision optical instrument used to measure the refractive index of a substance or solution. It is a valuable tool for analyzing and quality control of liquids, providing insights into their composition and concentration.

In industrial settings, a roaster is a specialized piece of equipment used for the thermal treatment of various substances. This process involves subjecting the material to controlled high temperatures, often in the presence of oxygen, to achieve specific objectives. Roasting is employed in diverse industries for purposes such as metallurgy, food processing, and environmental remediation. In this article, we will delve into the concept of roasting, its application areas, associated risks, recommendations for safe operation, historical significance, and legal considerations, while also discussing related thermal processing methods.

Roof terms refer to word or expression; specifically, one that has a precisely limited meaning in certain relations and uses, as in roofs.

Rocking chair is described as a uniquely American piece of furniture developed in the Colonial period, it consists of a chair mounted on curved runners which create a rocking motion when the unit is occupied.

Rotary screw compressor is a machine in which compression is affected by the positive action of rotating elements.

Roof refers to the assembly of interacting components designed to weatherproof and normally to insulate a buildings surface, separated from adjacent assemblies by walls or changes in elevation. A roof structure refers to the framework or framework system that supports the roof of a building or industrial facility.

Rock Cornish fryer, roaster, or hen is the progeny of a Cross between a purebred Cornish and a purebred Rock chicken, without regard to the weight of the carcass involved; however, the term fryer, roaster,or a hen shall apply only if the carcasses are from birds with ages and characteristics of a broiler or fryer or roaster or roasting chicken.

Rabbit refers to a domesticated lagamorph of the genus Orctolagus Cuniculus. Some of the meat sold fresh or frozen in the grocery store is a domesticated animal from the rabbit family. The meat is finely textured and almost all white. Choosing a small, younger rabbit, in the range of 2 to 3 pounds, will provide a more tender and mild flavored meat.