Coupling for an outlet conduit of a washing tank of a washing machine, the coupling comprising a connection conduit coupled to said outlet conduit, and a sealing gasket between said outlet conduit and said connection conduit. An image signal is inputted to a power control unit, wherein the power control unit includes a calculator and a power control look-up table. The polymer interacts with the complexing agent in a host-guest or a guest-host interaction to form an inclusion complex. In each phase, each party selects from a predefined list of actions associated with a particular aspect of the negotiation. The foot assembly includes an upper mounting member and a lower floor engagement member that is connected to the mounting member. , W represents a single bond or a bivalent linking group, and P represents a heterocyclic residue having a hetero ring contained in an organic pigment.