Bubbles Our main products include kinds of lever bubbles, which are well used for apparatus of measurement and mapping in geology and construction engineering, laser apparatus, electronic weighing apparatus and apparatus for aviation, space and national defence.The precision can be 2í¦-100' for long glass bubbles, 4'-100' for round bubbles.Our main products can be divided into 17 kinds, over 500 specifications with different precision. All our bubbles, metal, electronics, glass, long, round and others, are made strictly in accordance with national criteria of gb1146-89. 2í¦-100'
