小发明评点（一）敖子编码杆秤四川省长寿县葛兰中学张鹏程（男，１２岁）编码杆秤在秤杆上开槽，把秤砣做成条形，两者刻上编码，通过活节铆在一起，使用者不能随意更换秤砣。不用时，可把条形秤施嵌在槽里，便于携带．点评：张鹏程同学的这项发明较好地解决了普通杆秤易... Small invention Comments (A) Ao Zi encoding rod scale Changzhou County, Sichuan Province Gulang Middle School Zhang Pengcheng (male, 12 years old) Code rod scale Slotted in the scale pole, the scale made of 砣 bar, both engraved on the code, Together, the user can not freely change the scale 砣. When not in use, the bar scale can be embedded in the groove, easy to carry. Comments: Zhang Pengcheng students of this invention better to solve the common rod scale easy ...