中背经理椅 Managerial mediumback chair
大洋中背 mid ocean ridge
中背压系统 intermediate back-pressure system
中背片 [昆] mediotergite
中背压泡沫分布系统 intermediate back-pressure foam distributing system
中背司理椅 Managerial mediumback chair
前中背片 [古生] anterior median dorsal plate
后中背片 [古生] posterior median dorsal plate
中背唇 median dorsal lip
中背板 [昆] dorsulum ; central dorsal plate
规格：高背，中背，弯管。
持续地下压小臂和手腕，提升肩膀，内收中背。
Continue to press your forearms and wrists into the floor, lift your shoulders, and draw your mid-thoracic spine in and up.
按应用范围又可分为低背压式、中背压式、高背压式压缩机。
According to the application and can be divided into low back pressure type, back pressure type, in high back pressure type compressor.
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