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54HC4040 陶瓷 SN54HC4040J MC54HC4040J CD54HC4040F 74HC4040
MC74HC4040J SN74HC4040J MM74HC4040J M74HC4040FI 进口陶瓷
AAT4250IGV-T1 DSD1791 74HCT74 SN54HC4040J SMV1236-001