The portion of a safety/relief valve that surrounds the spring. The spring housing.

Established the standard basis for adjusting general average and stated the rules for adjusting claims.

[meaning]

South Africa (flag).

an antiwear additive found in many types of hydraulic and lubricating fluids. Zinc dialkyldithiophosphate.

A small freshwater mollusk that was accidentally introduced to North American waters via ballast water from a transoceanic vessel. The zebra mussel has had significant negative economic and ecological effects: It clogs water intake pipes and attaches to a ...

The point of the celestial sphere which is directly overhead.

The angle between the zenith and a heavenly body.

A gentle breeze; the slightest movement of air.

The temperature of pure melting ice under standard atmospheric pressure on the Centigrage and R

A discharge limit applied to manufacturing and commercial establishments in which only normal human sanitary wastewaters may be discharged to the municipal sewerage system. All other types of wastewater, such as that water used in manufacturing processes, ...

Sacrificial anodes placed on a vessel to prevent electrolysis of vital metal parts.

Used to indicated times measured in Coordinated Universal Time, a successor to Greenwich Mean Time. A time standard that is not affected by time zones or seasons.

Time based on Greenwich Mean Time.