简述什么是弯曲模?
参考答案:
弯曲模是使板料毛坯或其他坯料沿着直线(弯曲线)产生弯曲变形,从而获得一定角度和形状的工件的模具。
TheSafetyManagementCertificateshouldbeissuedtoashipforaperiodwhichshouldnotexceed()yearsbytheAdministrationoranorganizationrecognizedbytheAdministrationor,attherequestoftheAdministration,byanotherContractingGovernment.
A.five
B.six
C.seven
D.eight
年满18周岁的公民报名参加警察是其一项应尽义务。( )