有背着盐的和背着柴的人，两个人同时放下重担在树阴下休息。一会儿，将要走了，争一张羊皮，都说是自己垫肩的东西。李惠让他们出去，回头看州府的主簿说：“凭借这张羊皮能够查出它的主人吗?”下属官吏都不能回答。李惠叫人把羊皮放在坐席上面，用棒子敲打，看见（发现）有少许盐末，就说：“得到实情了!”再让争吵的双方进来看，背柴的人于是伏在地上承认了罪过。

补充　　（1）同释重担息（下）树荫 　　（2）惠令人置羊皮在席上

阐述道理
①对现实生活的细致观察和严谨的逻辑推理。 天下事都有一定的规律，只要多思考，多观察，就能透过现象看到本质。
②人与人交往之中一定要友善对待，不能贪图小利，让利益蒙蔽了双眼，做出不良的行为。
③处理问题要具备丰富的生活常识、经验，再加之细心观察，以及善于思考。

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CI801    ABB Advant 800xA Profibus DP-VI Communication Interface Module (CI801)
CI810A    ABB Advant 800xA AF100 Field Communcation Interface (CI810A)
CI810V1    ABB Advant 800xA AF100 Field Communcation Interface (CI810V1)
CI810V2    ABB Advant 800xA AF100 Field Communcation Interface (CI810V2)
CI820    ABB Advant 800xA S800 Redundant FCI (CI820)
CI820-1    ABB Advant 800xA CI820 Internal Module (CI820-1)
CI820V1    ABB Advant 800xA Redundant FCI (CI820V1)
CI830    ABB Advant 800xA ABB Profibus DP Communications Interface (CI830)
CI840    ABB Advant 800xA Redundant Profibus Communications Interface (CI840)
CI840A    ABB Advant 800xA Profibus Communication Interface - Redundant (CI840A) Alt# 3BSE041882R1
CI851K01    ABB Advant 800xA Profibus DP Interface Module Kit (CI851K01) Alt# 3BSE018101R1
CI854    ABB Advant 800xA Interface Module (CI854)
    
TB840    ABB Advant 800xA Modulebus Cluster Modem (TB840)
TB840A    ABB Advant 800xA Modulebus Cluster Modem (TB840A)
TB850    ABB Advant 800xA CEX-Bus Terminatior (TB850)
TK801V003    ABB Advant 800xA Modulebus Extension Cable (TK801V003)
TK801V006    ABB Advant 800xA Modulebus Extension Cable (TK801V006)
TK801V012    ABB Advant 800xA Modulebus Extension Shielded Cable (TK801V012)
TK811V015    ABB Advant 800xA POF Cable, 1.5m, Duplex (TK811V015)
TK811V050    ABB Advant 800xA POF Cable, 5m, Duplex (TK811V050)
TK850V007    ABB Advant 800xA Cable (TK850V007)
TP851    ABB Advant 800xA Base Unit for PROFIBUS DP Interface (TP851)
TP854    ABB Advant 800xA Base Unit for DP-V1 Interface CI854 (TP854)
TU810    ABB Advant 800xA Compact Module Termination Unit (TU810)
TU810V1    ABB Advant 800xA Compact Module Termination Unit (TU810V1)
TU811V1    ABB Advant 800xA Compact Module Termination Unit (TU811V1)
TU814V1    ABB Advant 800xA Compact Module Termination Unit (TU814V1)
TU830    ABB Advant 800xA Extended Module Termination Unit (TU830)
TU830V1    ABB Advant 800xA Extended Module Termination Unit (TU830V1)
TU831    ABB Advant 800xA Extended Module Termination Unit (TU831)
TU831V1    ABB Advant 800xA Extended Module Termination Unit (TU831V1)
TU835V1    ABB Advant 800xA Extended Module Termination Unit (TU835V1)
TU836V1    ABB Advant 800xA Extended Module Termination Unit (TU836V1)
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