/**
 * 从原始解析数据中构建 SS 材质的规格字符串
 * 格式：ASTM A312 GRADE TP304/304L-ASME B36.19M
 */
function buildSSSpecFromRaw($data) {
    $astm = '';
    $grade = '';
    $asme = '';

    // 将 materialSpec 字符串按空格拆分为数组
    $specParts = explode(' ', $data['materialSpec']);
    $allItems = $specParts;
    if (!empty($data['techStandard']) && $data['techStandard'] !== 'UNKNOWN') {
        $allItems[] = $data['techStandard'];
    }
    $allItems = array_unique($allItems);

    // 定义正则
    $astmPattern = '/^(ASTM\s+[A-Z0-9]+(?:\.[0-9]+[A-Z]?)?)$/i';
    $asmePattern = '/^(ASME\s+[A-Z0-9]+\.[0-9]+[A-Z]?)$/i';
    $gradePattern = '/^(GRADE\s+TP[0-9]+\/[0-9]+[A-Z]*|TP[0-9]+\/[0-9]+[A-Z]*)$/i';

    foreach ($allItems as $item) {
        $item = trim($item);
        if (empty($item)) continue;

        if (preg_match($astmPattern, $item, $matches)) {
            $astm = $matches[1];
        } elseif (preg_match($asmePattern, $item, $matches)) {
            $asme = $matches[1];
        } elseif (preg_match($gradePattern, $item, $matches)) {
            $grade = $matches[1];
        }
    }

    // 如果 grade 仍未匹配到，尝试从任何项中提取 TP 牌号
    if (empty($grade)) {
        foreach ($allItems as $item) {
            if (preg_match('/TP[0-9]+\/[0-9]+[A-Z]*/i', $item, $m)) {
                $grade = $m[0];
                break;
            }
        }
    }

    // 组合结果
    $parts = array();
    if (!empty($astm)) $parts[] = $astm;
    if (!empty($grade)) $parts[] = $grade;
    $spec = implode(' ', $parts);
    if (!empty($asme)) {
        if (!empty($spec)) $spec .= '-';
        $spec .= $asme;
    }
    return $spec;
}