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We present formulae for computing the Yamada polynomial of spatial graphsobtained by replacing edges of plane graphs, such as cycle-graphs,theta-graphs, and bouquet-graphs, by spatial parts. As a corollary, it is shownthat zeros of Yamada polynomials of some series of spatial graphs are dense ina certain region in the complex plane, described by a system of inequalities.Also, the relation between Yamada polynomial of graphs and the chain polynomialof edge-labelled graphs is obtained.

On Yamada polynomial of spatial graphs obtained by edge replacements