… of former crops, roots, etc. They generally consist of two large wheels and a drum fitted with cutting blades. … , similar to a harrow but fitted with hooked teeth in two rows converging towards an openslatted container, to …
… signs. (E) Burglar alarms . These consist of two parts : a detecting part, and a signalling part (bell, … (F) Fire alarms . Automatic alarms also consist of two parts : a detecting part, and a signalling part (bell, …
… panel, or of a sheet of plaster, etc., the space between the two surfaces being filled with insulating material (tarred … E-section margining, supporting bars of a thickness ranging between 2 and 5 mm and a width of 20 to 50 mm, and …
… (38.1 m long x 1.22 m wide) in rolls consisting of two outer layers of aluminium foil (thickness 5 μm) and an … (thickness 3.1 mm). The weight percentage per m2 of the two layers of aluminium foil and polyethylene air bubble … and the polyethylene bubble wrap trapped air spaces between the foil surfaces insulate against conduction of …
… Hub Unit", with double rows of rollers consisting of (i) two steel inner rings (internal diameter: 54 mm), (ii) a … (iii) 40 pieces of steel rollers (20 pieces x 2 rows), (iv) two plastic cages and (v) two rubber seals. The flanged outer ring has tapped holes …
… di‑ or tribasic (with monovalent metals they contain one, two or three metal atoms); there are, for example, three … (f) Sodium metaphosphates (basic formula (NaPO 3 ) n ). Two metaphosphates meeting this description are sodium …
… ELEMENTS GENERAL Chemical elements can be divided into two classes, non‑metals and metals. In general, this … Chlorine is a greenish‑yellow gas, suffocating, corrosive, two and a half times as dense as air, slightly soluble in …
