board-level
1.Diagnosing a DS1 runs board-level hardware tests on the DS1 interface.
3.The results show that the viscoelasticity of PCB and its size have distinct influence on dynamic properties of PCB under board-level drop impact.
6.The corrections to the concept that I/O CHRDY signal of XT and AT bus must be driven by open-cllector (OC) gate are given. The necessary and sufficient condition for substituting OC gate for tristate logic (TSL) gate is described. The substitution method is characterized by higher reliability and better ordered board level routing.
7.When condole of PVC of choose and buy carries profile on the head, besides should ask for qualitative check report and product to detect to agency besides certificate of approval, can quality of range estimation exterior, board face should level off is smooth, flawless, without knock against, can tear open outfit freely, exterior luster does not have nick, the knock that use a hand board face sound is ringing.
8.In order to prepare production of high level pipe steel and cold rolling board, through analyzing clean level of Q235B steel that been produced by process of 210t top bottom double blowing convert - LF refining - CSP continuous casting - rolling, the paper puts forward controlling direction of clean steel.
