首先看秤上是否有计量检定合格证。合格证一般采用两种形式，一是用不干胶合格证；二是铝制合格证。木杆秤的合格证钉在（或贴在）两纽之间，台秤的合格证一般在立柱上端。秤上须有鉴定钢印，钢印是鉴定机构的代号，具有法律效力。一般的台、案秤打在计量杠上端。称铊应完整无? First look at the scale whether there are metrological verification certificate. Certificate generally use two forms, one with a sticker certification; the second is aluminum certificate. Certificate of wood scale nail (or attached) between the two New Zealand, scale certification is generally the top of the column. There must be certified on the scale stamp, seal is the identification code of the agency, with legal effect. General Taiwan, case scale hit the top of the metering bar. Thallium should be complete without?