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2. String trimmer - Wikipedia

   en.wikipedia.org/wiki/String_trimmer

   A fixed line style string trimmer head. A fixed-line string trimmer has a trimmer head that takes pre-cut line inserts. There is no wound spool of line in the trimmer head; the user instead feeds the pre-cut line in to the appropriate slots, making the trimmer easier to feed line into and troubleshoot than a bump feed system. [citation needed]

3. Brushcutter (garden tool) - Wikipedia

   en.wikipedia.org/wiki/Brushcutter_(garden_tool)

   Top-of-the-line units use a straight "split" shaft with a disconnection point partway along the shaft, allowing the cutting head to be replaced by other accessories such as pole pruners, cultivators, edgers and hedge trimmers. Bike handlebar style brushcutter ready for transport. To use, the handlebars are rotated and the red blade guard removed.

4. Aerial saw - Wikipedia

   en.wikipedia.org/wiki/Aerial_saw

   A ten-blade saw demonstrated by FirstEnergy in 2017. An aerial saw is a saw which is flown through the air. The aerial saw may also be known as a helicopter aerial saw.. Large aerial saws are flown by helicopter to trim trees in remote locations when they overgrow power lines, pipelines or other infrastructure.

5. Completion (oil and gas wells) - Wikipedia

   en.wikipedia.org/wiki/Completion_(oil_and_gas_wells)

   It is a cylindrical valve with either a ball or flapper closing mechanism. It is installed in the production tubing and is held in the open position by a high-pressure hydraulic line from surface contained in a 6.35 mm (1/4") control line that is attached to the DHSV's hydraulic chamber and terminated at surface to a hydraulic actuator. The ...

6. Pruning shears - Wikipedia

   en.wikipedia.org/wiki/Pruning_shears

   Professional pruning shears often have replaceable blades. There are three different blade designs for pruning shears: anvil, bypass and parrot-beak. Anvil pruners have only one blade, which closes onto a flat surface; unlike bypass blades it can be sharpened from both sides and remains reliable when slightly blunt. Anvil pruners are useful for ...

7. Wellhead - Wikipedia

   en.wikipedia.org/wiki/Wellhead

   In exploration wells that are later abandoned, the wellhead may be recovered for refurbishment and re-use. Offshore, where a wellhead is located on the production platform it is called a surface wellhead, and if located beneath the water then it is referred to as a subsea wellhead or mudline wellhead. [2] [3] [4] [5]