φ1.2M绞车底架与轴承接触面高低不平不得大于()
A. 0.5mm
B. 0.6mm
C. 0.7mm
D. 0.8mm
管理层次(Span of Control)是指一名管理人员直接有效地指挥下级人员的数量。
A. 正确
B. 错误
Which organization would conduct a survey of the insulation in a reefer compartment prior to loading cargo? ()
A. PRC Customs Service
B. OSHA
CCS
D. CCIQ