saltpetre

n.

硝石，硝酸钠；

SALTPETRE
SALTPETRE
SALTPETRE
SALTPETRE, STATE SECURITY AND VEXATION IN EARLY MODERN ENGLAND
The Production of Saltpetre in the Middle Ages
The Saltpetre Cogeneration Transformation of the Traditional System of NOx Device
The dendroarchaeology of Cagle Saltpetre Cave: a 19th century Saltpeter mining site in Van Buren County, Tennessee, U.S.A.
Matchlocks, Flintlocks, and Saltpetre: The Chronological Implications for the Use of Matchlock Muskets among Ottoman-Period Bedouin ...
The East India Company's monopoly industries in Bihar with particular reference to opium and saltpetre, 1773-1833
On the effect of our regeneration measures on the formation of saltpetre in the ground and its importance in the regeneration of con...