| lead abbr. | |
| gen. | guiar; plombo |
| chem. | plomo |
| earth.sc. | grafito |
| econ. | plomo |
| environ. | plomo |
| industr. construct. | correa |
| mech.eng. | paso helicoidal |
| transp. | canal estrecho |
|
superluminescent : 2 phrases in 2 subjects |
| Antennas and waveguides | 1 |
| Communications | 1 |