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Flux-Cored-Arc Welding (FCAW)This process is a variation of GMAW. Electrodes comprise a metal sheath surrounding a core of fluxing and alloying coin pounds. Sell-shielded (FCAW-SS), it uses gas generated by bleak down of a powder-flux core inside the wire to shield the weld. Gas shielded (FCAW-SS), external gas supplies shielding.The compounds in the electrode perform essentially the same functions as the coating of a covered electrode used in SMAW: to form a floating slag coating on the weld pool to protect the weld as it solidifies; deliver deoxidizer and scavengers to help purify the weld: deliver are stabilizers to minimize spatter; add alloying elements to the weld, for optimum mechanical properties; and provide shielding gas.

Allmand Brothers, Holdrege, Neb., has remained family-owned since its founding in 1938. The company introduced its first mini-backhoe in 1995. It currently has four models, the TLB 20, 25, 25D and 35D. The TEB 20, added last year, competes with the Terramite T5. The TLB 35 is rated 33 hp, while the other machines carry 20 to 25 hp engines. Dig-It was part of HCC when we last looked at this segment. HCC owned the product line from 1993 until 1999 when it was sold to Yazoo/Kees Power Equipment, Jackson, Miss., which has been renamed Pug Power. The Dig-It machine has been produced since the 1980s. Two models are currently offered, the 22 hp model 2208 and the 20 hp Tiger M2008.

What, Why, HowWorldwide radio-navigation GPS is possible due to a constellation of 24 orbiting satellites (plus three spares) and associated ground receivers.Terrestrial GPS receivers use the satellites as reference points to calculate positions accurate to a matter of feet. Advanced forms of GPS used by the military are accurate to less than an inch. Civilian GPS, previously accurate only to 100 yards, was improved ten-fold in May 2000, when President Bill Clinton ordered the U.S. military to stop intentionally degrading the satellite signals used by civilians. Now GPS essentially gives every square foot on the planet a unique address.