堵塞课程
machine is equipped with smoke powder box, running the machine through the nozzle can be lessons arising from the dust, to avoid clogging dust adhesion, and recyclable materials re-use.───机内配有吸粉箱，通过吸嘴可吸取机器运转时所产生的粉尘，避免粉尘粘结堵塞，并可回收原料重新使用。
singing lessons───歌唱课
driving lessons───驾驶课程
logging stone───伐木石
logging stones───伐木石
singing lesson───歌唱课
clogginess───堵塞
cuffing seasons───翻版季节