The calcium tolerance of phosphonic acid is lower than polymer type scale inhibitors.

有机膦酸的钙容忍度低于聚合物防垢剂。

youdao

Outer Scale (Fig. 6) - This scale is a micrometer-type scale marked 0-9 at the tapered base of the red handwheel.

外刻度（图6） - 这个刻度是测微计类型刻度，在红手轮的锥形底座上标注0 - 9。

youdao

Active lime pit is advanced in structure as it adopts reliable both-ends combined type scale sealing, making the air leakage factor below 10%.

活性石灰窑结构先进，采用可靠的回转窑两端组合式鳞片密封，使漏风系数小于10%；

youdao

He said the type and scale of engagement should be proportional to the potential impact of the proposal and whether or not it was an issue that had previously been consulted on, "rather than following the same bureaucratic process".

BBC: Cabinet office minister Oliver Letwin

Does it have an increasing-returns-to-scale type dynamic involved?

FORBES: Profiting From The Wisdom Of Crowds

And right now, the technology to produce this fuel type on a widespread scale simply does not exist.

FORBES: Bush's Energy Obstacle: Ethanol