Motor Carrier Safety Fitness Certificate Regulations是什么意思?

Motor Carrier Safety Fitness Certificate Regulations是什么意思? safety management certificate是什么意思 fitness是什么意思? carrier是什么意思 motor carrier company 是指什么公司 certificate是什么意思? safety是什么意思 fitness center是什么意思 fitness landscapes是什么意思啊? physical fitness是什么意思? warranty of fitness是什么意思 His failure to observe the safety regulations results in an