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发明名称
GAS INJECTION ARRANGEMENT FOR PREVENTING PIPELINE SLUMPING
摘要
申请公布号
US3575469(A)
申请公布日期
1971.04.20
申请号
USD3575469
申请日期
1969.04.11
申请人
SHELL OIL CO.
发明人
FRANK L. MEYER
分类号
B65G53/30;F16L55/24;(IPC1-7):B65G53/30
主分类号
B65G53/30
代理机构
代理人
主权项
地址
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