OperatingSurplus refers to the balance of the value added created by the resident units deducting the labourersre m unera-' tion , taxes on production and the depreciation of fixed assets.
营业盈余是指常住单位创造的增加值扣除劳动者报酬，生产税净额和固定资产折旧后的余额。
2
Sewage sludge which mainly comes from the primary settling tank and discharge of surplus sludge is the deposit produced in each operating unit in municipal wastewater treatment plant.
城市污泥是城市污水处理厂经各级处理净化污水而产生的沉积物，主要来自初沉池和剩余污泥的排放。
3
At the same time, the market is operating with limited surplus production capacity, leaving it vulnerable to supply disruptions.