proj4.js如何将UTM转换为EOV坐标？

我使用javascript将UTM转换为WSG84 lon lat，代码如下，其中UTM_区域包含UTM区域号

var utm = "+proj=utm +zone=";
utm = utm + "" + utm_zone;
var wgs84 = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs";
var lonlatArray = proj4(utm, wgs84, [utm_x, utm_y]);

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但是我如何参数化以直接将UTM格式转换为EOV（epsg:23700）？

使用来自的EOV/epsg:23700的定义

例如：

var utm = "+proj=utm +zone=34T";
var epsg23700 = '+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 +k_0=0.99993 +x_0=650000 +y_0=200000 +ellps=GRS67 +towgs84=52.17,-71.82,-14.9,0,0,0,0 +units=m +no_defs';
console.log(proj4(utm, epsg23700, [352920, 5263357]));