Penilaian: 4 dari 5 bintang
4/5
Memuat
JH![]()
author
John J. Hoefner
John J. Hoefner is a mechanical consultant specializing in reciprocating and centrifugal compressors, engines, turbines, and pumps. He is the former chief engineer of Worthington S...lihat lebih banyakJohn J. Hoefner is a mechanical consultant specializing in reciprocating and centrifugal compressors, engines, turbines, and pumps. He is the former chief engineer of Worthington Service Corporation.lihat lebih sedikit