“virtual work principle”的概念、定义、翻译、参考文献-科学参考

单词	virtual work principle
释义	virtual work principle [`vǝr·chǝ·wǝl ¦wǝrk ´prin·sǝ·pǝl] See <<principle of virtual work>>
随便看	packet gland packet switching packet transmission pack hardening pack ice packing packing density packing fraction packing house packing house pitch packing index packing proximity packing radius packing ring packing routine pack rolling packsand packstone pack unit pack wall pactamycin pad pad deluge overpotential overpressure

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