1、
the three classes of posts setting of grey collar professionals in modern auto manufacturing field
现代汽车制造工程灰领技术人才三级岗位群设置
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2、
3、
Bore hole should be clean without by-pass oil setting position of packer should avoid casing collar.
井筒必须清洁无死油,封隔器的座封位置应避开套管接箍.
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4、
Setting position of rubber barrel should be located in different position of casing collar location.
封隔器胶筒坐封位置必需避开套管接箍位置.
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