Want to have a desk clock with alarm clock, calendar date, temperature display and night projection function? This versatile fashion clock features high-definition focus projection, alarm clock function, date inquiry, large screen temperature display, time (month And date) and perpetual calendar function and backlight projection display in one, manual projection, screen light can be long, night time to see the time; warm night light, full of fun; automatic lighting color backlight and rotating projection display, 16 worlds The famous song + BLBL is optional, placed on the side of the bed and in front of the desk, so that it is not difficult to make a bit of life "organized". The fashion clock is made of ABS material, the specification is 75×75×136.5MM, and the price is 35 yuan.
MAPP is colorless in both liquid and gas form. The gas has a pronounced acetylene-like or fishy odor at concentrations above 100 ppm, due to the addition of substituted amines as a polymerization inhibitor. Low molecular weight alkynes have strong odors. Mapp Gas is toxic if inhaled at high concentrations. Mapp gas is a mixture of various hydrocarbons, principally, methylacetylene , propadiene and Propane(MAPP). It produces a relatively hot flame (2,976°C) with a high heat release in the primary lame (inner cone) (15,445kJ/m 3 ), less than for acetylene (18,890kJm 3 ) but much higher than for propane (10,433kJm 3 ). The secondary flame (outer cone) also gives off a high heat release, similar to propane and natural gas. The combination of a lower flame temperature, more distributed heat source and larger gas flows compared with acetylene results in a substantially slower pierce time.
Mapp Gas
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