… These can be obtained only from esters of inorganic polybasic acids of non-metals (sulphuric, phosphoric, silicic, etc.). Polybasic acids have more than one replaceable acidic …
… networks, electrical traction systems (railway, tramway, trolleybus, etc.), and also for indoor installations or on … bells, pulleys, etc.) for overhead lines of railways, trolleybuses , cranes, etc., or for aerials. (B) Rigid …
… hour 8402.19 - - Other vapour generating boilers, including hybrid boilers 8402.20 - Super-heated water boilers 8402.90 … walls of some boilers are also formed of watertubes. (3) Hybrid boilers, which are generally a combination of types …
