Tender For corrigendum : supply of collecting electrode , helical wire type emmiting electrodes , complate shaft assly.for collecting rapping mechanism , complate shaft assly.for emitting rapping mechanism , inner arm assly for collecting and emitting rapping , outer-arm assly.for collecting rapping , outer-arm assly.for emitting rapping , plaine bearing for esp , shaft insulator for esp , shock-bar with anvil for collecting rapping , anvil for emitting rapping , gas distribution screen plate ii for esp , shockbar guide front side , shockbar guide rear side