classes: lecturer. The practical lab is too old, so improve and build a lab system so that students can practice the skills of this subject. curriculum. The practical lab is too old, so improve and build a lab system so that students can practice the skills of this subject. facility. The practical lab is too old, so improve and build a lab system so that students can practice the skills of this subject. general. The practical lab is too old, so improve and build a lab system so that students can practice the skills of this subject.