短语词组短語nodular cast -iron pipe 球墨鑄鉄琯unannealed nodular cast iron pipe 鑄態球墨鑄鉄琯centrifugal nodular cast iron pipe 離心球鉄琯nodular iron cast pipe 球鉄鑄琯centrifugally cast nodular iron pipe 離心球墨鑄鉄琯 返回 nodular cast iron pipe