重力坝（gravity dam）

1、尿比重（urinaryspecific gravity，SG）

尿比重（urinaryspecific gravity，SG）

2、For a purifier, changing to a gravity

For a purifier, changing to a gravity disc with larger hole diameter will move the interface towards the （）.Abowl peripheryBbowl centerCupper surfaceDlower surface

3、The （） of the gravity disc is too big

The （） of the gravity disc is too big It causes oil to flow through the water outletWe changed the disc and no oil is found in the water outlet.AgravityBdiameterCcircumferenceDcylinder

4、If the vertical center of gravity (VCG

If the vertical center of gravity (VCG) of a ship rises 1.7 feet，the righting arm (GZ) for the various angles of inclination will（）.AdecreaseBincreaseCremain unchangedDbe changed by the amount of GG' x cosine of the angle

5、A crankshaft whose center of gravity c

A crankshaft whose center of gravity coincides with its center line is said to be （）.Adynamically balancedBstatically balancedCcounter balancedDresonantly balanced

6、坝体渗漏（dam leakage）

坝体渗漏（dam leakage）