Before starting the turning gear, _____ should be worked by hand to minimize corrosive action on the liners.

放射性物质 A: Toxic Materials B: Corrosive Materials C: Radioactive Materials D: Magnetic Materials E: Explossives F: corrosives

Oil<br/>filters, if regularly serviced, can remove solid contaminants from<br/>crankcase oil, but chemical reactions may form liquids that are<br/>corrosive and damaging. ( )

TTL 5520TS INCLDG FOB BAGGED FERTILIZER 5000TS, CIF MAIZE N STRAW PRODUCTS 262TS N FERRIC CHLORIDE (CORROSIVE UNNO 1773) 68TS, OTHER GENERALS 190TS.