As a retired industrial pattern maker, I have made a good many valve bodies. Patterns that go to a foundry to be cast. A most wonderful profession. ty John
Watching this video I enjoy and can support the learning system in Vocational High Schools (SMK), thank you...success for "Russell............"....Pekalongan, Central Java, Indonesia
please help me out here. who originally made these videos back in the 90s. any keyword i can use to search for them would be very helpful. they are very helpful and detailed, id like to use them for my studies.