求翻译：间接法测得的血压为一近似值，精确程度与测量技术有关系。在测量时，缠缚袖带要平展，使上臂、心脏和水银检压计的零点(或弹簧检压计)，尽量保持在同一水平上，并且放气不要过快，否则将出现较大的误差。是什么意思？

Indirect method of measuring the blood pressure is an approximation, the degree of precision measurement techniques. Chan Fu cuff in the measurement to be flat, the upper arm, heart, and mercury check pressure meter zero (or spring check pressure meter), try to keep on the same level, and deflated i

indirectly measured the blood pressure as an approximation, and level of precision and measurement techniques. When measured in cuffs, and wrapped around the upper arm to be flat, the heart and the mercury test pressure gauge the zero point (or spring test pressure gauge) and try to keep at the same

The indirect method obtains the blood pressure is an approximate value, the precise degree and the survey technology have the relations.When survey, shackles the sleeve belt to have to be flat and smooth, causes the upper arm, the heart and the mercury manometu zero (or spring manometu), maintains a

Indirect measurement of blood pressure is an approximate value, precision and measurement technology. At the time of measurement, wrap tie cuffs to flatten, make the upper arm, chest, and mercury manometer zero (or spring manometer), try to keep it on the same level, and not too quickly, or a larger

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