's license as plumber in the State of Michigan, or Michigan State Journeyman Plumber's license necessary....
. City of Detroit plumbing license, or Master's license as plumber in the State of Michigan, or Michigan State Journeyman... Plumber's license necessary....
is required. 3. City of Detroit plumbing license, or Master's license as plumber in the State of Michigan, or Michigan State... Journeyman Plumber's license necessary....