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我队职工在八中全会的鼓午下,在大闹技术革新与技术革命运动中,发扬了敢想、敢说,敢干的共产主义风格,提出了在硬岩中使用双刃硬质合金钎头(见附图)。经反复试验证明,在九级以上的岩石
Under the drum-noon of the 8th Plenary Session, our team of workers carried forward the communist style of daring to think, dare to say and dare to do hard work in the technical revolution and technological revolution. It proposed the use of double-edged cemented carbide Bit (see photo). After repeated tests to prove that more than nine rocks