【化】 低级烷烃(低碳数烷烃)

the south of the lower reaches of the Yangze River

delegate power to the lower levels; shift of power to the grassroots

looper thread bobbin, bobbin for lower thread

lower(esophageal)high-pressure zone

upper leg (lower cxtremity )

right lower quadrant

hemorrhoids and fistulas of the lower body

Lower jaw