concave grating मीनिंग इन हिंदी

उदाहरण वाक्य

1. Moving rasp bars or rub bars pull the crop through concaved grates that separate the grain and chaff from the straw.
2. Mitchell was awarded an astronomy assistantship for his second year at JHU and continued until he received his PhD in 1898 with his thesis published in the Astrophysical Journal, which included a discussion of the amount of concave grating.