Assertion: vanillin's production | /r/HasAspect | more than 100 years of history
Facets:
Source sentences:
text: Industrial production of vanillin has more than 100 years of history, people have studied the ways and methods of many synthetic preparations, but the application in a large-scale industrial production are mainly the following three methods.
text: Industrial production of vanillin has more than 100 years of history, people have studied the ways and methods of many synthetic preparations, but the application in a large-scale industrial production are mainly the following three methods.