By exerting the basic principles and theories of commodity science,law hermeneutic and logic,the thesis is trying to clarify the definition of "end-jointed" wood products in the context of two major works of tariff reference,"CGAC" and "CGAC Annotation",especially of the 44th chapter of these two books.

According to the different theoretic basics, there are different interpretation principles about idea indications They influence the contract law very deeply, such as the contract’s force, the contract’s fulfillment and so on .

At present, to learners’dictionary explanation research, mostly is by explains the whole the concise elaboration which makes for the object of study, from the macroscopic angle proposed the explanation principle,but to explains from the microscopic angle union word nature carries on the th.