spool retainer
1Monofilament fishing line — A tangle of monofilament fishing line. The most common colorless variety can be seen. Monofilament fishing line (shortened to just monofilament) is fishing line made from a single fiber of plastic. Most fishing lines are now monofilament because… …
2Drilling rig — For a detailed diagram of a Petroleum drilling rig, see List of components of oil drilling rigs. Drilling rig preparing rock blasting …
