半熟练和非熟练劳动力，这两个较便宜的各类建设船员在印度，协助梅森I类和梅森II级。
Semi-skilled and unskilled labour, the two less expensive categories of construction crew in India, assist mason class I and mason class II.
半熟练和非熟练劳动力，这两个较便宜的各类建设船员在印度，协助梅森I类和梅森II级。
Semi-skilled and unskilled labour, the two less expensive categories of construction crew in India, assist mason class I and mason class II.
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