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公开(公告)号：US1258654A
公开(公告)日：1918-03-12
申请号：US4063615
申请日：1915-07-19
Applicant: RAILWAY MATERIALS COMPANY
Inventor： CRAM TIM B
CPC classification number: F23D14/22
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公开(公告)号：US1272918A
公开(公告)日：1918-07-16
申请号：US4188115
申请日：1915-07-26
Applicant: RAILWAY MATERIALS COMPANY
Inventor： CRAM TIM B
CPC classification number: F27B9/201
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