Mixers; apparatus for preparingand mixing compounds; holding devices for machine tools; lifting and tilting apparatus; mixing apparatus; apparatus or machines for preparing flooring compounds; parts of mixing machines (other than for land vehicles); vacuum pumps; machines for the mixing of materials (industrial); mixing apparatus (powered machines); machines for construction purposes; machines for the construction industry; machines for use in the construction of flooring, ceiling and wall surfaces; spiral mixing machines; portable mixing apparatus; parts and fittings for all the aforesaid goods