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Even where lead piping, or lead-sheathed cable, still needs to be jointed, this is carried out with a wiped joint, rather than a burned joint. Wiping a lead joint is a soldering process, using plumber's solder (80% lead / 20% tin) and is carried out at low temperature, with a natural-draught propane blowtorch. Today, even wiped joints are rare ...
Level winders can be hydraulically or electrically driven and computer controlled, or they can be simple mechanical devices. A mechanical level winder comprises a main shaft (the lead screw) with helical screw grooving along which the rope feeder travels. The rope feeder housing includes two vertical roller bars and one horizontal roller, or ...
The upper and lower diamond guides are usually accurate to 0.004 mm (0.16 mils), and can have a cutting path or kerf as small as 0.021 mm (0.83 mils) using Ø 0.02 mm (0.79 mils) wire, though the average cutting kerf that achieves the best economic cost and machining time is 0.335 mm (13.2 mils) using Ø 0.25 mm (9.8 mils) brass wire.
PDC – polycrystalline diamond compact (a type of drilling bit) PDG/PDHG – permanent downhole gauge; PDGB – permanent drilling guide base; PDKL – PDK log [clarification needed] PDKR – PDK 100 report [clarification needed] PDM –positive displacement motor; PDMS – permanent downhole monitoring system; PDP – proved developed ...
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Drawing dies are typically made of tool steel, tungsten carbide, or diamond, with tungsten carbide and manufactured diamond being the most common. [2] For drawing very fine wire a single crystal diamond die is used. [2] For hot drawing, cast-steel dies are used. For steel wire drawing, a tungsten carbide die is used.
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