Cast glass and rolledglass, in sheets or pro - files, whether or not having an absorbent, reflecting or non-reflecting layer, but not otherwise worked.
铸制或轧制玻璃板、片或型材及异型材，不论是否有吸收、反射或非反射层，但未经其他加工。
2
The common troubles, roll bending, occurred during rolledglass production were described and the on-line measurement procedure of the roll bending was illustrated step by step.
Even the modern approach, in which the subject's finger is rolled over a glass plate for scanning, often requires several attempts per finger to get a usable print.