System and methods for processing encoded messages at a message receiver are described. The instrument includes a device for feeding in at least one liquid and a device for high frequency surgery. The conductive connection socket has a clamping portion for clamping and securing the inserting portion of the conductive connection plug. The present invention also provides a method of suppressing the removal rate of an underlying silicon-containing dielectric layer during the chemical-mechanical polishing of a barrier layer in a damascene structure. The openable pivot includes recesses on the first handle and pins, which are insertable in the recesses on the second handle.