main waste pipe

基本解釋

The paper summarized the main vocation related to the mercury in the municipality waste water pipe, such as medical institution, manufacturing of wiring and equipment.
城市污水管網(wǎng)中的涉汞行業(yè)，主要包括醫(yī)療機(jī)構(gòu)、電器設(shè)備及器材制造業(yè)、化學(xué)原料及化學(xué)制品制造業(yè)、印刷行業(yè)等。
Waste draining pipe, offlet or drain pipe should be connected to the main pipe; each pipe should connect two valves with the most possible short valve-to-valve pipe length.
排污管、放水管或疏水管應(yīng)分別連接到各自的總管上，每管均應(yīng)串接兩個(gè)閥門(mén)，兩閥門(mén)間的管段應(yīng)盡量縮短。