續一切經音義 2.78

2.78

善軶（下於格反俗作軛正作軶從戶乙聲也鄭眾注考工記云軶轅端壓牛領木也）。

Good yoke (善軶: the second character has the fanqie 於 + 格; the popular form writes 軛; the correct form is 軶; it takes 戶 with 乙 for phonetic. Zheng Zhong's commentary to Kaogong ji says, “The yoke is the wood at the end of the shaft that presses on the ox's neck”).