(正式)在前的,先行的;

Set up and upgrading repair and prevenient maintenance plan. Lead repairman implement it.
建立并完善修理和维护性保养计划, 并组织实施.
来源:网络文摘精选And airborne contrary, buyer is pick upgoods commonly prevenient, pay after.
而空运则相反, 买方一般都是提货在先, 付款在后.
来源:互联网摘选In fact, the price of the concentration products also much higher than our prevenient acquirement.
但就是浓缩型的也比我们在之前询问的价格高出不少.
来源:互联网摘选
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