| • पेट्रोलियम टार • पेट्रोलियम-पिच | |
| petroleum: मिट्टी का तेल | |
| pitch: चोटी डामर चढ़ाव या | |
petroleum pitch मीनिंग इन हिंदी
petroleum pitch उदाहरण वाक्य
उदाहरण वाक्य
- During the 1960s, experimental work to find alternative raw materials led to the introduction of carbon fibers made from a petroleum pitch derived from oil processing.