背管室 [昆] corcula
靠背管可折翻 folded backrest tube
铅背管 Metal Back Tube
背血管 [昆] dorsal vessel ; dorsal blood vessel
背对背二极管 backtobackdiodes ; back-to-back diode ; BTB ; BTB Back to Back diode
管状脊背底盘 Backbone tubular chassis
背气管干 [昆] dorsal tracheal trunk
背通气管 back vent
背气管 intrasiphonata ; [昆] dorsal trachea
复杂的管道可采用建立背压的方法进行清管、测径。
Complex pipe can be established by the method of back pressure pigging, caliper.
操作电脑时将鼠标放置的位置过高，使手腕在操作中需背屈成一个难受的角度，并保持紧张状态，也会引起腕管组织增生。
Computer operation when placing the mouse position is too high, ShiShouWan in operation will back QuCheng a bad Angle, and keep the nervous state, can also cause carpal tunnel tissue hyperplasia.
介绍一例：利用管式蒸汽冷却器将背压机排汽加热凝汽机给水，从而提高机组热经济性。
Here an example is: heating the feedwater of condensing turbine by exhaust steam of a back pressure turbine (through tubular steam cooler) to raise the set's heat economy.
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