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Installation, maintenance, repair, refurbishment, and remanufacture of: pressure vessels for laboratory use; pilot process units for testing and research; valves and fittings not parts of machines for use in extreme temperature and pressure applications in the chemical, petroleum and related industries; manual coning and threading tools; chemical reactors; catalytic reactors; cone closure (tube) catalyst reactors; kuentzel (tube) fixed bed reactors; mini-reactors; bolted closure laboratory batch reactors; high temperature, bolted closure laboratory batch reactors; stirred laboratory reactors; stationary basket catalyst reactors; catalyst testing reactors; micro catalyst reactors; spinning basket reactors; spinning basket catalyst reactors; falling basket catalyst reactors; multi-reactor systems; laboratory tube reactor systems; automatic tube reactor systems; production size polyethylene reactors; laboratory stirred reactors; instrumentation for use in extreme temperature and pressure applications in the chemical, petroleum and related industries, namely, controllers, pressure indicators and transducers, monitors and thermocouples; valves being parts of machinery for use in the chemical, petrochemical, oil and gas industries, namely, shut-off valves, ball valves, high temperature and cryogenic valves, micrometering valves, relief valves, yoke valves, severe service valves, and oil field valves; hydraulic and pneumatic valve actuators; manifold valves; fittings for low, medium and high pressure valves; adapters for machines for connecting tubing and piping; couplings for machines, namely, couplings having male and female coupling members, machine couplings for stiff and flexible pipes, tubes and tubing, hose couplings, couplings for farm machines and agricultural implements, couplings for hydraulic apparatus, hydraulic quick release couplings for high pressure hoses, couplings for pneumatic apparatus, couplings for aerospace and outer space applications; agitators for gas dispersion, liquid blending and motion, and solids suspension; pressure pumps and vacuum pumps; pressure vessels; bolted closure pressure vessels; closure pressure vessels; O-ring closure pressure vessels; threadless pin closure pressure vessels; resilient thread closure pressure vessels; standard, air driven liquid pumps; compact, air driven liquid pumps; compact, hand lever liquid pumps; high volume, air driven pumps; magnetically coupled mixers; reactor controllers; controllers for control and monitoring of temperature, pressure, and mixer speed; universal tachometer displays; universal motor controllers; universal flow controls; high pressure pumps; high pressure impregnation systems; low density polyethylene vessels; corrosion test systems; hydrothermal /crystal growth vessels; down hole simulation systems; core dissolving/removal systems; and, subsea simulation vessels