304法兰球阀Q41F-16P(机械部)
316法兰球阀Q41F-16R(机械部)
304法兰球阀Q41F-16P(化工部)
316法兰球阀Q41F-16R(化工部)
304美标法兰球阀Q41F-150LB
316美标法兰球阀Q41F-150LB