已制成的

The no staff and self-reducing tacheometer is a new type of surveying instrument designed and constructed by a group of teachers and students of our department.

无须跑尺自计视距仪是一种新式仪器,经过研究,我们已初步试制成功。

Book sewing machine is one kind of book binding machines, by which the gathered signatures in paginal order from the collecting machine can be sewed to from book blocks.

锁线机是将配页机按页顺序已成册书帖，通过锁线制成书芯机械。