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On June 2, 1975, the Department of Trade was created under PD 721 to pursue efforts of the government toward strengthening the country's socio-economic development, particularly in the area of commercial activities. [7] A key strategy of the new department was vigorous export promotion to generate much needed foreign exchange.
Arc welding is a welding process that is ... Exposure to the brightness of the weld area leads to a condition called arc eye in ... ISBN 0-87170-780-2; Blunt, Jane ...
Shielded metal arc welding (SMAW), also known as manual metal arc welding (MMA or MMAW), flux shielded arc welding [1] or informally as stick welding, is a manual arc welding process that uses a consumable electrode covered with a flux to lay the weld.
Electrodes are available in straight lengths and coils. Their diameters may be 1.6, 2.0, 2.4, 3, 4.0, 4.8, and 6.4 mm. The approximate value of currents to weld with 1.6, 3.2 and 6.4 mm diameter electrodes are 150–350, 250–800 and 650–1350 amps respectively.
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Argon-CO 2 with 1–2% hydrogen provides a reducing atmosphere that lowers amount of oxide on the weld surface, improves wetting and penetration. Good for austenitic stainless steels. Argon with 2–5% nitrogen and 2–5% CO 2 in short-circuiting yields good weld shape and color and increases welding speed. For spray and pulsed spray transfer ...