Angular Expansion Joints have a single bellows with overall length restrained by hinge hardware designed to accommodate pressure thrust. A hinged expansion joint allows angular movement in a single plane. Those systems, which consist of two gimbals and a hinge can accommodate very large movements with very low reaction loads on the adjacent equipment. This is a very attractive application for large diameter hot piping systems even if the movements are complex and not in a single plane.

Angular Turning Holders is used for chamfering operations. The angular position of the beater is adjusted by loosening the screw bolts, then turning the beater holder to the desired angular position around the locating device, and then fastening the screw bolts.

Aniline Oil is brown-coloured liquid, heavier than water and pure enough for the preparation of the aniline colours. It is oily poisonous liquid amine obtained from nitrobenzene and used to make dyes, plastics, and medicines. The aniline oil is also removed by means of filter paper. Aniline oil boils at 175° or 180°C.

In the case of an anion exchange membrane, free anion in the electro-deposition coating bath move from the painting bath to cathode. Then free anions permeate the anion exchange membrane, move to the electrode solution and connect with H+ ions produced at the anode to form acid and discharged from the upper overflow nozzle together with the electrode solution. In the case of cation exchange membranes as well as anion exchange membranes, anions in the electro-deposition coating bath move from the painting bath to the anode. However the cation exchange membranes prevent anions from permeating to the electrode solution, whereas H+ ions permeate the cation exchange membranes and acid remains in the painting bath as it is.

The anion exchange resins are commonly used resin. It contains hydroxide ions and are divided into strong and weak base classes. These are used to remove negatively charged ions, such as SO2-4. Anion exchange resins are generally lower in their exchange capacity and durability than cation exchange resins and are seldom used for industrial separation.