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进行发动机听诊是机务人员判断发动机技术状况的常用手段之一。发动机运转时,根据大小、形状和材料不同的金属零件相互撞击时产生不同响声的特点,靠从外部听到的响声来判断配合件的技术状态。显然,听诊的结果很大程度上取决于农机人员的实践经验,而这些经验不是短时期所能积累的。于是在教学中也成了难点。尽管书上对各部位的响声作了详细的描述,教师也千方百计模拟它,但效果很难令人满意,学员难于掌握,教学
Auscultation of the engine is one of the common means used by crew to determine the technical condition of the engine. Engine operation, according to the size, shape and material of different metal parts collide with each other when the characteristics of the characteristics of different sound, heard from the outside sound to determine the technical status of the mating parts. Obviously, the outcome of an auscultation largely depends on the practical experience of agricultural workers, and these experiences are not accumulated in a short period of time. So in teaching has become a difficult point. Although the book gives a detailed description of the sound of various parts of the book, teachers do everything possible to simulate it, but the effect is difficult to satisfactory, students difficult to grasp, teaching