There was difficulty in charge of the original machine structure, the long adjustment time, the heavy physical labour and so on.

机床原有结构存在入料困难，调整时间长，劳动强度大等。

youdao

When you are used to physical Labour, you feel uncomfortable if you're idle.

劳动惯了，闲着就不舒服。

《新英汉大辞典》

The most prominent characteristic of mother was her lifelong participation in physical Labour.

母亲最大的特点，是一生不曾脱离过劳动。

youdao

Men with less cash tended to do more physical labour so their jobs kept them fit and slimmer.

BBC: Obesity 'starts in the womb'

And people on probation must seek work but can decline job offers, such as those requiring hard physical labour in the sweltering midsummer.

ECONOMIST: Georgia��s immigration bill will hit farmers where it hurts

Just 750 of the firm's 30, 000 infected South African employees now get treatment, but 97% of them are back in full-time work, including heavy-duty physical labour.

ECONOMIST: Business and AIDS in Africa