res is the usual result of an I/O operation: the number of bytes transfered, or a negative error code.

res是IO操作的通常结果：传输的字节数，或者负值的错误码。

youdao

For this kind of inner packing product, its positive-negative error of the weight should be controlled within the regulated limits.

这种内包装产品的重量，正负误差控制在规范标准之内。

youdao

Moreover, keeping negative error (3% or so) of wall thickness and adopting big feeding rate are beneficial to improve the precision of spinning parts.

旋压过程中保持一定的负偏离(3%左右)，同时采用较大的进给比有利于提高旋压件精度。

youdao

Moreover, keeping negative error (3% or so) of wall thickness and adopting big feeding rate are beneficial to improve the precision of spinning parts.

旋压过程中保持一定的负偏离(3%左右)，同时采用较大的进给比有利于提高旋压件精度。

youdao