Research on the Impact of 3D Printing on the International Supply Chain

Table 1

Variable symbol of international supply chain.

Symbol	Meaning of variables	Symbol	Meaning of variables	Symbol	Meaning of variables
α	Raw material α	β	Raw material β	γ	Semiproduct γ processed by α
δ	Semiproduct δ processed by β	ε	Finished product ε	OA	The origin of α in A
OB	The origin of β in B	PA	The port in A	PB	The port in B
PC	The port in C	PD	The port in D	PPCα	The processing plant of α in C
PPCβ	The processing plant of β in C	APC	The assembly plant in C	DCA	The distribution center in A
DCB	The distribution center in B	DCC	The distribution center in C	DCD	The distribution center in D