Abstract: Disclosed is an easily biodegradable composite formulated with cellulosic fibers of wood pulp and recycled pulp and fiber components of fruits and vegetables, and a paper product obtainable from said composite. The purpose is to provide paper products effectively utilized strained lees of juices being wastes of fruits and vegetables and fruits and vegetables of poor commercial value in the market.

Abstract: A piezoelectric diaphragm pump assembly is disclosed, wherein there is disposed a housing having an inlet port provided with a feed check valve, and an outlet port provided with a discharge check valve, wherein a casing is disposed for accomodating an amplification mechanism, said casing having an L-shape stationary member, to which a plate spring is fixed, a front end portion of the plate spring being fixed with a lever member of the amplification mechanism, which is engaged with an upper portion of a longitudinally effective type piezoelectric actuator, and wherein a diaphragm body coated with a film is disposed, characterized in that a front end portion of the lever member is fixed with a supporting member which is, in turn, fixed with a U-shape supporting member for supporting the diaphragm body, and that the supporting member is connected via a spring to the L-shape stationary member.