"With a diameter of 2.86 meters, family cars can easily pass by. This is the first time we have produced and processed such a' super-large-diameter' slide valve". On November 22, Ma Xiaocheng, the production and operation center of PetroChina Bohai Equipment Petrochemical Equipment Company, said that the world's largest diameter double-acting slide valve processed and produced by the company has entered the flange plane processing process.

There is a saying in the agricultural proverb: "Wheat rises at the vernal equinox, and every moment is worth a thousand dollars". It reminds us to cherish spring, the plan of the year lies in spring, and only when we sow in spring can we reap in autumn.