[问答题] 公司给经销商发“三包期限”内配件的前提条件是什么？

局部振动病的典型表现为（）。 ["发作性手指变白","肌萎缩","听力下降"] Which software-based security threat is typically spread from user to user via e-mail?（） ["Virus","Trojan horse","Denial of service","Data interceptio"] FANUC系统中，（）指令是夹盘松指令。 ["M08","M10","M09","M11"] 感应加热淬火时，若频率为50kHZ，则淬硬层深度为（）。 ["17.5mm以上","26—48mm","10—15mm","7mm"] 母体胎盘 公司给经销商发“三包期限”内配件的前提条件是什么？