1)congo blue paper,刚果蓝试纸2)congo red test paper,刚果试纸3)Congo red test paper,刚果红试纸4)blue litmus paper,蓝石蕊试纸5)litmus blue test paper,蓝色石蕊试纸6)vulcanized fiber,刚纸
用法和例句
We introduce a method with Congo red test paper to test the thermal stability of PVC mixed with rare-earth thermal stabilizer.