机械行业从整体来说是一个技术密集型行业，一个熟练的技术工人要经过七八年苦练，甚至十多年的培养，才能胜任本工种的生产操作。近几年来，由于种种原因，大批五十年代、六十年代参加工作的老工人退休或退到企业后方，青年工人成为企业生产的主力军。随着对外开放的深人，人 The machinery industry as a whole is a technology-intensive industry. A skilled worker must be trained hard for seven or eight years or even cultivated for more than ten years to be able to perform the production operation of this type of work. In recent years, due to various reasons, a large number of old workers who participated in the work in the 1950s and 1960s retired or retired to the rear of the company, and young workers became the main force for production. With the deep people opening up to the outside world, people