- polyoxymethylene by Alexia Glover
... organic chemistry) (OCH 2) n. A polymer of formaldehyde that has excellent mechanical and high-temperature properties. Also know as polyacetal; polyformaldehyde.
- Formaldehyde by Great Soviet Encyclopedia
... , pentaerythritol, pharmaceuticals, and dyes. It is also used in the tanning of leather and as a disinfectant and deodorizing agent. The polymerization of formaldehyde yields polyformaldehyde.Formaldehyde is toxic; its maximum tolerable concentration in the air is 0.001 mg/liter.
- Gear Drive by Great Soviet Encyclopedia
... kaprolon, wood laminates, or polyformaldehyde), and its counterpart is made of steel. Gear drives are designed to resist bending pressures in the dangerous section at the bases of the teeth and contact pressures in the pole of contact.Gear drives are used in the form of simple single-stage drives and of various combinations of several drives built into machines or made as ...