目的：研究腹部压块对膈肌运动的影响。
Objective To study the effect of abdomen pressure on diaphragm motion.
世纪初期，燃料压块是工业领域一项重要的工艺。
The briquetting of fuel was a significant business in the early 20th century.
焦煤压块机故障率低，发热量小，生产率高，节电耐用。
Coke press low failure rate, high calorific value small, productivity, power saving and durable.
我感觉好像心上压了块石头。
我感觉好像心上压了块石头。
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