A ship comprises a bilge water sump collecting bilge water and contaminants. In multilayer piezoelectric device 1, a melting point of a material of the electroconductive members in the through holes is higher than a melting point of a material of the internal electrodes 2 and others. A protection wall extends continuously from a bottom wall before a resilient contact piece while leaving a clearance for entry of the male tab. Methods of making and using these genes and proteins are disclosed as well as methods for the recombinant expression, and transformation of suitable host cells.