Grease is a semisolid liquid that consists of a liquid lubricant mixed with a thickener. The oil does the lubricating while the thickener holds the oil and provides a resistance to flow. Soaps (a metallic element such as lithium, calcium, sodium, or aluminum reacted with a fatty acid) or fine particles of a lubricating additive, such as polytetrafluoroethylene (PTFE) or lead are used as thickeners in the grease.
http://www.sino-grease.com/hig....h-temperature-grease

A drone is an unmanned aircraft. Drones are more formally known as unmanned aerial vehicles (UAVs) or unmanned aircraft systems. Essentially, a drone is a flying robot that can be remotely controlled or fly autonomously using software-controlled flight plans in its embedded systems, that work in conjunction with onboard sensors and a global positioning system (GPS).
http://www.satuav.com/glider-drone-runway-drone/

Stainless steel fittings remain the most popular fitting used on standard HPLC systems today, due to their high temperature resistance and high-pressure holding abilities. Our durable and strong 316 Stainless Steel Fittings are rated to 20,000 psi (1,380 bar) when wrench tightened.
http://www.jrfluid.com/stainless-steel-fitting/

While comfort, benefits and popularity of modern uPVC windows are obvious and unquestionable in today's market, there is definitely one thing uPVC windows can't provide – they cannot replace the naturally warm appearance of real wood. So if you are among those homeowners who appreciate this particular feature and think it is one of the essential requirements, then you should consider installing aluminum clad wood windows in your house.
http://www.joyfidentchina.com/....aluminum-clad-wood-w

Excavators
Excavators are important and widely used equipment in construction industry. Their general purpose is to excavation but other than that they are also used for many purposes like heavy lifting, demolition, river dredging, cutting of trees etc.
http://www.construction-machin....e.net/construction-m