However, their availability is limi

However, their availability is limited to the
Eastern regions of the U.S. Oil well cements were included due to
their very low C3A content. White Portland cements were selected
due to their moderate C3A content and the very low amount of
C4AF leading to highest values of C2S + C3S, up to 87%.

結果 (中文) 1:

然而，它们的可用性仅限于东部地区的美国石油油井水泥被列入由于他们 C3A 含量很低。白色硅酸盐水泥入选由于他们适度的 C3A 含量和很低的量C4AF 导致的 C2S + C3S，最高值达 87%。

結果 (中文) 3:

然而，他们的可用性是有限的美国油井水泥
东部地区包括由于
非常低C3A含量。波特兰白水泥被选择
由于其适中的C3A含量和
C4AF导致C3S C2S含量很低的最高值，达87%。