Use of agonists and antagonists of the nicotinergic acetylcholine receptors of insects for the non-systemic control of parasitic insects, such as fleas, lice and flies, on humans and on animals. A method is provided for storing data generated by a plurality of parallel processes to a shared object in a parallel computing system. The pump comprising: a piston adapted for reciprocating movement, an operating device for operating the piston, a heart contacting organ. The wire is pulled out from the washers via the hole in the washer transferring member. Rotational displacement of the shaft clockwise causes the first seal to seal off the source of fluid pressure from the valve chamber, while allowing for fluid discharge through the drain port.