爲了更好的演示幾何關學實驗的，GY—II激光光學演示儀被研製出來了。
工藝採用冷鍛、熱打、切削，GY爲本廠產品的註冊商標。
從鴨梨、蘋果、棗、葡萄等水果的果皮中篩選出了一株適於鴨梨酒釀造的酵母菌，命名爲GY。
GY-3 depressant is added to Jingan crude oil and Wuqi crude oil individually and on-site test is made in Jingma pipeline.
We use cold-forming, hot-striking and cutting to produce the products. The products registering trade mark is GY.
