| prov:value
| - and hangers, using handtools and power tools. 10) Installs and maintains hydraulic and pneumatic components of machines and equipment, such as pumps and cylinders, using handtools. 11) Installs and maintains refrigeration and air-conditioning systems, including compressors, pumps, meters, pneumatic and hydraulic controls, and piping, using handtools and power tools, and following specifications an
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